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Look to my Sig. 4 mission Arc, takes about a hour.
With the way Customs are now on the Mains, a couple of the Critters are a bit overpowered and it's settings related. If you have a extra BF or two, you should be fine.
Feedback can be left in the thread the Sig link goes to.
Thank you for the time...
@Travlr (Main) / @Tymers Realm (Test) 
You might try Threefold Rule (197183). I recently finished it and am still making minor tweaks, and so would definitely appreciate constructive feedback. 
Depending on your build, I think all of the missions in my sigline should be solo friendly for you. I will warn you that the custom group has a few axers in the mix that can be a little tough, but they are all set on standard difficulty. There are no EB/AVs in any of the missions. One of the missions listed, 'Deal with the Devil's Pawn', is a CoT single mission that I might be replacing soon, with an updated version. Since a standard CoT boss set on random (to accommodate a wider level range) wouldn't work for the story, I have created one for it. Again, it's also set at standard difficulty.
I hope you will enjoy them. They are all story focused with bios for all of the customs. Please, send feedback via PM or post it in the thread linked in my sig. 
No AV/EBs Deal with The Devil's Pawn-207266 Slash DeMento and the Stolen Weapons-100045 Meet the Demon Spawn-151099 Feedback
Thanks for the recomendations. It's been very nice having new stories to level with after all most four years .
Taking It On the Chin I-16 Tanker Guide
Repeat Offenders
Consider "The Key and the Chain," #193451. It deals with the Legacy Chain and Banished Pantheon. While there's a level 40-50 group listed in the arc, that's the BP; they're functionally identical to the 20-29 versions. There are a few EB's scattered around, but you're given help for all of them. (PLEASE send me feedback about whether the friendly "ambush" shows up to help you in mission 2!)
In testing, I was able to solo the arc, including the EB's, with a level 26 DB/WP scrapper (natural level, not exemp'd) with few problems, so you should be all right.
"Bombarding the CoH/V fora with verbosity since January, 2006"
Djinniman, level 50 inv/fire tanker, on Victory
-and 40 others on various servers
A CoH Comic: Kid Eros in "One Light"
A bit at the high end of your request range, but I think my "the Revenge of Hro'Dtohz" (1356) would work well for you around 35+. So long as you can fight Rikti, you can solo this arc. Of course, it's more fun with a team.
I'd also like to suggest "Hunting the Dark Dragon" (2922), but the (optional) final boss is intended to be a challenge, so since you don't like challenge missions, that one might not be your thing. Just putting it out there in case you'd like to sniff around it anyway. Written as a 40+ arc, but comfortable at 35+ for most.
"If I had Force powers, vacuum or not my cape/clothes/hair would always be blowing in the Dramatic Wind." - Tenzhi
Characters
Time Loop: 137561
Level range: 15-30
No AVs or EBs, just a few bosses and some Wyvern. It's a fun mystery with lots of details, clues, and time-loop references.
Might I recommend one of my arcs?
Arc ID: 131500
Title: "The Guardian Diggers & The Brainwashed Miners"
It's minorly challenging, with a buffet of varied Elite Bosses, one served in each mission. Try your hands at it. One or two of the EBs may pose problem for you depending on build (my Regen scrapper was slaughtered when one the EBs fired Drain Psyche), but it should be reasonably soloable on a scrapper in his late 20s-early 30s.
You should be able to do "Tales of Croatoa" in my sig, once you get into your 30s. You get help against the EB at the end, but I'd recommend bringing plenty of purples and greens.
131430 Starfare: First Contact
178774 Tales of Croatoa: A Rose By Any Other Name ( 2009 MA Best In-Canon Arc ) ( 2009 Player Awards - Best Serious Arc )
All of my arcs are good for 25+. Order of toughness I feel would be (from easiest to hardest):
Death to Disco! (84420)
Trademark Infringement (2220)
Have a Blap, Blap, Blappy Day Kids! (2019)
A few more details in my sig.
WN
Check out one of my most recent arcs:
457506 - A Very Special Episode - An abandoned TV, a missing kid's TV show host and more
416951 - The Ms. Manners Task Force - More wacky villains, Wannabes. things in poor taste
or one of my other arcs including two 2010 Player's Choice Winners and an2009 Official AE Awards Nominee for Best Original Story
[ QUOTE ]
. . . I'd recommend bringing plenty of purples and greens.
[/ QUOTE ]
For what it's worth, three purples and a couple of respites have enabled me to solo almost anything an AE arc can throw at me with any character.
"Bombarding the CoH/V fora with verbosity since January, 2006"
Djinniman, level 50 inv/fire tanker, on Victory
-and 40 others on various servers
A CoH Comic: Kid Eros in "One Light"
I will be starting on these tomorrow, feel free to make additions, even if I don't get them all done on this scrapper I can always do them on the next toon.
Taking It On the Chin I-16 Tanker Guide
Repeat Offenders
Just a quick note. I did the rewrite/replacement of the CoT mission, Deal with the Devil's Pawn, and the new ID# is in my sigline. Have fun.
No AV/EBs Deal with The Devil's Pawn-207266 Slash DeMento and the Stolen Weapons-100045 Meet the Demon Spawn-151099 Feedback
Well, my arc, Soldiers of Fortune, (Listed in my signature) is intended to be played in the 30-35 range. It does have an AV/EB and moderately challenging foes but it should be manageable for most people. It's also a villainous arc, so if you don't mind your scrapper acting out of character, I'd definitely like for you to try it out.
My arcs:
Title: Blitzkrieg
Arc ID: 3416
Title: Soldiers of Fortune
Arc ID: 4431
Title: The Rikti Accession
Arc ID: 278757
Fighting Freedom is a 5 mission villainous arc for levels 21-30ish (level cap jumps around a level in either direction, and there's no cap on the 4th mission). It's been played at every level from 20 to 30. It has an EB in the last mission, who's either a piece of cake if you're on heroic or a monster on anything else. Just fair warning.
Celebrity Kidnapping plays well in the 30-38 range.
@PW - Police Woman (50 AR/dev blaster on Liberty)
TALOS - PW war journal - alternate contact tree using MA story arcs
=VICE= "Give me Liberty, or give me debt!"
I just "finished" a level 20-29 Warriors/Banished Pantheon Arc.
"Warriors Three"
ID# 64885
Soloable, would love feedback.
Noght 50 Scrapper Broadsword/Invulnerability
Fire Umbra 50 Brute Dark Melee/Fire Aura
Impulse Cry 50 Blaster Sonic/Energy
Internist 50 Mastermind Poison/Thugs
Ice Omega 50 Corrupter Ice/Radiation
Prickly Heat 50 Dominator Plant/Fire
Champion Server
I just published my second arc, and one that is geared in that level range:
Name: An Army of One
Foes: 5th Column Loyalist and Custom Group
Missions: 4 total, small or med maps.
Intro: You have been asked to show around a student from the local highschool as part of a super's mentoring program. When the base commander you arrest makes a threat on her family, all things began to come unhinged. Her little sister is cast into immediate danger at the hands of a new faction. Can you save her sister from this new threat?
Well, I just did a major update to my mid-level arc:
The Second Coming of the Mega Mech (122274)
It's level 25-32, I just ripped out the AVs, there is one EB who hits fairly hard but definitely should be soloable by a Scrapper. The custom enemies are a bit tougher than the standard mobs, but not by much, no exotic damage types, debuffs or heavy mezzing.
Eva Destruction AR/Fire/Munitions Blaster
Darkfire Avenger DM/SD/Body Scrapper
Arc ID#161629 Freaks, Geeks, and Men in Black
Arc ID#431270 Until the End of the World
Check my sig for my arcs. "The Council Cargo" is 26 - 31 and "Enter The Exterminator" is level 1 - 54 and lowbie friendly.
I'm gonna throw mine out there. It's designed to be playable at pretty much any level (hopefully it mostly meets that goal). It's a five mission arc. There are two EBs and one AV, but its designed with playability in mind, rather than extreme challenge. I've successfully soloed them and grouped against them, so hopefully this meets your needs. I'm always looking for more feedback with a variety of different groups; unfortunately
Arc Name: Destined Champion of the Multiverse
Arc ID: 128476
Faction: Custom Group
Creator Global/Forum Name: @Purple Badger
Synopsis: Your character has been chosen to protect the multiverse. You travel through various dimensions tracking down threats to the peace of all dimensions.
Estimated Time to Play: 1ish hours
Link to More Details and Feedback
First off thanks for the submissions so far. It's been a joy to play many of these player created arcs.
To date I have completed 5229, 197183, 207266, 100045, 151099, 137561, and I'm approaching the end of 1356.
This is a substantial chunk of the arcs already so I encourgae anyone with additional 20-35 range arcs to post them or drop me a line.
Taking It On the Chin I-16 Tanker Guide
Repeat Offenders
Fighting Freedom is 21-30ish, with some variances in the level range, with the 4th mission not having one since it has only custom enemies. Arc ID is in my sig.
Teen Phalanx Forever (67335) is 15-20, 20, 20-25 and 25-29; the first two missions would be at the low end of your range.
Celebrity Kidnapping (1388) is 30-38 to 30-40ish; villainous morality, though.
@PW - Police Woman (50 AR/dev blaster on Liberty)
TALOS - PW war journal - alternate contact tree using MA story arcs
=VICE= "Give me Liberty, or give me debt!"
I am currently leveling a scrapper soley through AE missions, as I imagine many others are. The low levels went very smoothly thanks to a thread here (now purged?)containing a list of lowbie arcs.
I would like to request your arcs for the mid game. Levels 20-35 or 40. I'm not interested in farms, challenge arcs and the like. While I'm not a reviewer per se I always rate the arcs and try to provide constructive feedback if I see a need.
Thanks in advance.
joe
Taking It On the Chin I-16 Tanker Guide
Repeat Offenders