Well I threw a quickie in what I might have gone with. Lvled a DB to 50, and currently working on a Regen, so no experience with those 2 sets together...
What you have here is Build Up combo at lvl 8, chaining that combo till lvl 18, then you run basicly Build up + Vengenful Strike. At 20, you will have weaken, not a big fan of that combo, but it's an AoE, we all love that 
At 28, you will have Build up + Attack Vitals combo to spin around with, together with a Typhoon now and then. At 32, you basicly have your attack chain... Build Up + 1000 Cuts + Attack Vitals, repeat. Even without Haster, you'll have no downtime throwing that combo. I "think" I tested out that Build Up lasted for 1000 cuts and Attack Vitals, however the dmg is impressive =) Power Slice is well... okay Sweep is nice to migrate some dmg, but the mob is dead before I "need" to migrate some dmg... Weaken I only use if fighting AVs n' such that lasts for more than 10 secs.
I left the slotting since I'm still working on my baby Regen scrappers slotting. "May" consider Stamina earlier than 30... still considering that =)
Hero Plan by Mids' Hero Designer 1,4006
http://www.cohplanner.com/
Level 3 Natural Scrapper
Primary Power Set: Dual Blades
Secondary Power Set: Regeneration
Power Pool: Speed
Power Pool: Fitness
Hero Profile:
Level 1: Nimble Slash -- Empty(A)
Level 1: Fast Healing -- Empty(A)
Level 2: Reconstruction -- Empty(A)
Level 4: Ablating Strike -- Empty(A)
Level 6: Quick Recovery -- Empty(A)
Level 8: Blinding Feint -- Empty(A)
Level 10: Dull Pain -- Empty(A)
Level 12: Hasten -- Empty(A)
Level 14: Super Speed -- Empty(A)
Level 16: Integration -- Empty(A)
Level 18: Vengeful Slice -- Empty(A)
Level 20: Typhoon's Edge -- Empty(A)
Level 22: Hurdle -- Empty(A)
Level 24: Health -- Empty(A)
Level 26: Resilience -- Empty(A)
Level 28: Sweeping Strike -- Empty(A)
Level 30: Stamina -- Empty(A)
Level 32: One Thousand Cuts -- Empty(A)
Level 35: Instant Healing -- Empty(A)
Level 38: Moment of Glory -- Empty(A)
Level 41: Power Slice -- Empty(A)
Level 44: [Empty]
Level 47: [Empty]
Level 49: [Empty]
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Critical Hit
------------
[u]Set Bonus Totals:[u]------------
[u]Set Bonuses:[u]
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Ta for the build but I honestly have no idea how to slot any of the regen power at all...
I plan to lvl up so a respec wouldn't work unfortunately and they are what I specialize in tbh.
Can you post a leveling build that is slotted?
Okies, slapped together a build with slots for my Kat/Regen... Work in progress I think :P Noticed it's enough with 4 slots on the heals if you slap in heal/recharge reducer IOs... ql30+ (instead of 3x heal + 3x rechargers), not cheap but frees up some slots for other goodies.
So far I've not missed the extra AoE from Flashing Steel, hence why I've planned it so late.
Hero Plan by Mids' Hero Designer 1,4006
http://www.cohplanner.com/
Level 50 Science Scrapper
Primary Power Set: Katana
Secondary Power Set: Regeneration
Power Pool: Speed
Power Pool: Fitness
Power Pool: Fighting
Hero Profile:
Level 1: Sting of the Wasp -- P'ngS'Fest-Acc/Dmg:30(A), P'ngS'Fest-Dmg/Rchg:30(40)
Level 1: Fast Healing -- Heal-I:50(A), Heal-I:50(3), Heal-I:50(5)
Level 2: Reconstruction -- Numna-Heal/Rchg:50(A), Dct'dW-Heal/Rchg:50(3), Mrcl-Heal/Rchg:40(5), H'zdH-Heal/Rchg:40(46)
Level 4: Quick Recovery -- EndMod-I:50(A), EndMod-I:50(7), EndMod-I:50(7)
Level 6: Build Up -- AdjTgt-ToHit:50(A), AdjTgt-ToHit/Rchg:50(9), AdjTgt-Rchg:50(9), AdjTgt-ToHit/EndRdx/Rchg:50(21), AdjTgt-EndRdx/Rchg:50(50)
Level 8: Divine Avalanche -- LkGmblr-Def/Rchg:50(A), LkGmblr-Def/EndRdx:50(37), LkGmblr-Def/EndRdx/Rchg:50(37), LkGmblr-EndRdx/Rchg:50(37), Acc-I:50(40), Acc-I:50(40)
Level 10: Hasten -- RechRdx-I:50(A), RechRdx-I:50(11), RechRdx-I:50(11)
Level 12: Dull Pain -- Numna-Heal/Rchg:50(A), Numna-Heal/EndRdx/Rchg:50(13), Numna-EndRdx/Rchg:50(13), Dct'dW-Heal/Rchg:50(15), Numna-Heal/EndRdx:50(15)
Level 14: Super Speed -- Run-I:50(A)
Level 16: Integration -- RgnTis-Heal/Rchg:30(A), Dct'dW-Heal/Rchg:50(17), H'zdH-Heal/EndRdx:40(17), H'zdH-Heal/EndRdx/Rchg:40(19)
Level 18: The Lotus Drops -- M'Strk-Acc/Dmg:50(A), Achilles-ResDeb%:20(19), M'Strk-Dmg/Rchg:50(21), M'Strk-Acc/EndRdx:50(43), M'Strk-Acc/Dmg/EndRdx:50(43), M'Strk-Dmg/EndRdx/Rchg:50(43)
Level 20: Swift -- Run-I:50(A)
Level 22: Health -- Heal-I:50(A), Heal-I:50(23), Heal-I:50(23)
Level 24: Stamina -- EndMod-I:50(A), EndMod-I:50(25), EndMod-I:50(25)
Level 26: Soaring Dragon -- C'ngImp-Acc/Dmg:50(A), C'ngImp-Dmg/EndRdx:50(27), C'ngImp-Dmg/Rchg:50(27), C'ngImp-Acc/Dmg/Rchg:50(31), C'ngImp-Acc/Dmg/EndRdx:50(34), C'ngImp-Dmg/EndRdx/Rchg:50(36)
Level 28: Instant Healing -- Dct'dW-Heal/Rchg:50(A), Dct'dW-Heal/EndRdx/Rchg:50(29), H'zdH-Heal/Rchg:40(29), H'zdH-Heal/EndRdx/Rchg:40(36)
Level 30: Resilience -- Aegis-ResDam/EndRdx:50(A), Aegis-ResDam/EndRdx/Rchg:50(31), TtmC'tng-ResDam/EndRdx:50(31), Aegis-ResDam:50(36)
Level 32: Golden Dragonfly -- Sciroc-Acc/Dmg:50(A), Sciroc-Dmg/EndRdx:50(33), Sciroc-Dmg/Rchg:50(33), Sciroc-Acc/Rchg:50(33), Sciroc-Acc/Dmg/EndRdx:50(34), Sciroc-Dam%:50(34)
Level 35: Boxing -- Acc-I:50(A)
Level 38: Moment of Glory -- LkGmblr-Def/Rchg:50(A), RedFtn-Def/Rchg:50(39), Aegis-ResDam/Rchg:50(39), TtmC'tng-ResDam/Rchg:50(39)
Level 41: Tough -- TtmC'tng-ResDam/EndRdx:50(A), TtmC'tng-ResDam/Rchg:50(42), TtmC'tng-ResDam:50(42), TtmC'tng-ResDam/EndRdx/Rchg:50(42), TtmC'tng-EndRdx/Rchg:50(46)
Level 44: Weave -- S'dpty-Def/EndRdx:40(A), S'dpty-Def/Rchg:40(45), S'dpty-Def/EndRdx/Rchg:40(45), S'dpty-Def:40(45), S'dpty-EndRdx/Rchg:40(46)
Level 47: Flashing Steel -- C'ngBlow-Acc/Dmg:50(A), C'ngBlow-Acc/Rchg:50(48), UndDef-DefDeb/Rchg/EndRdx:50(48), UndDef-DefDeb/Rchg:50(48), UndDef-DefDeb/EndRdx:50(50), UndDef-Rchg:50(50)
Level 49: Revive -- P'Shift-EndMod/Rchg:50(A)
------------
Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Critical Hit
------------
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Hasten really isn't needed for dual blades.
your attacks will be up without gaps in attack chains without it.
I'd also get weaken in earlier, as the debuff it does really helps your survivability at lower levels.
At higher levels you can respec out nimble slash and just string attack vitals and sweep together indefinatly.
For DB, hasten is not needed... Attack Vitals + BU + Sweep is keeping you swinging those blades. However, Hasten is not bad at all for Regen. Perman DP (or close to it) is a reason alone to go for Hasten =)
If you're looking for the best AoE DPS then hasten is useful to keep the Attack Vitals combo up but then its rare to see scrappers herd. 
He will honor his words; he will definitely carry out his actions. What he promises he will fulfill. He does not care about his bodily self, putting his life and death aside to come forward for another's troubled besiegement. He does not boast about his ability, or shamelessly extol his own virtues. - Sima Qian.
[ QUOTE ]
If you're looking for the best AoE DPS then hasten is useful to keep the Attack Vitals combo up but then its rare to see scrappers herd.
[/ QUOTE ]
My combo with DB goes Build up + 1000 cuts + Attack Vitals, then repeat. (I left out sweeping cause I wanted BU to last through Attack Vitals, tho at times if I wanna do lil migration, I go BU + Attack Vitals + Sweep then repeat, less dmg since the total combo is longer. BU + 1000 + AV you don't need hasten to make that combo spinning forever n' ever n' ever n' ever. (okay I do have some +recharge bonuses on IOs to consider into it)
Rare with Scrappers to herd? I do it all the time if not teaming with tank Sure mebbe not as big herds as a tank, but try to squeeze a few groups.
Dual blades is an AoE monster and tight groups of normally intimidating numbers can get demolished fast if all goes well. Solo the tighter the group of mobs the more likely you'd kill them all before they kill you and you regen off them.
He will honor his words; he will definitely carry out his actions. What he promises he will fulfill. He does not care about his bodily self, putting his life and death aside to come forward for another's troubled besiegement. He does not boast about his ability, or shamelessly extol his own virtues. - Sima Qian.
I have just recently started a new Dual Blades/Regeneration Scrapper who is eating through enemies like nobodies business but I am confused as to what powers I should take in both Primary and Secondary...
I plan to take Hasten/SS and Hurdle/Health/Stamina but the rest is gravy.... Does anyone have a DB/Regen build that can incorperate my Pool powers whilst still having all of the available DB combos? If you have a would be very grateful if you could post it