Something like this should work. At high levels it can double as a teaming build. The order in which powers were taken is on purpose, but pay no attention to the levels I added slots.
Hero Plan by Mids' Hero Designer 1.707
http://www.cohplanner.com/
Click this DataLink to open the build!
Level 50 Magic Defender
Primary Power Set: Cold Domination
Secondary Power Set: Dual Pistols
Power Pool: Leaping
Power Pool: Fitness
Power Pool: Medicine
Power Pool: Leadership
Ancillary Pool: Power Mastery
Hero Profile:
Level 1: Ice Shield -- DefBuff(A), DefBuff(40), DefBuff(42), EndRdx(42)
Level 1: Pistols -- Acc(A), Dmg(36), Dmg(37), Dmg(37), EndRdx(37), RechRdx(40)
Level 2: Dual Wield -- Acc(A), Dmg(3), Dmg(3), Dmg(9), EndRdx(11), RechRdx(11)
Level 4: Empty Clips -- Acc(A), Dmg(5), Dmg(5), Dmg(7), EndRdx(7), RechRdx(9)
Level 6: Combat Jumping -- DefBuff(A)
Level 8: Swift -- Run(A)
Level 10: Swap Ammo
Level 12: Arctic Fog -- DefBuff(A), DefBuff(13), DefBuff(13), EndRdx(15), ResDam(15), ResDam(36)
Level 14: Super Jump -- Jump(A)
Level 16: Bullet Rain -- Acc(A), Dmg(17), Dmg(17), Dmg(19), EndRdx(19), RechRdx(36)
Level 18: Health -- Heal(A)
Level 20: Stamina -- EndMod(A), EndMod(21), EndMod(21)
Level 22: Suppressive Fire -- Acc(A), Dsrnt(23), Dsrnt(23), Dsrnt(25)
Level 24: Benumb -- Acc(A), Acc(25), RechRdx(42), RechRdx(43)
Level 26: Sleet -- RechRdx(A), RechRdx(27), RechRdx(27), EndRdx(34)
Level 28: Executioner's Shot -- Acc(A), Dmg(29), Dmg(29), Dmg(31), EndRdx(31), RechRdx(31)
Level 30: Aid Other -- Heal(A), Heal(46), Heal(46)
Level 32: Aid Self -- Heal(A), Heal(33), Heal(33), IntRdx(33), RechRdx(34), EndRdx(34)
Level 35: Heat Loss -- Acc(A), RechRdx(43), RechRdx(46)
Level 38: Hail of Bullets -- Acc(A), Dmg(39), Dmg(39), Dmg(39), RechRdx(40)
Level 41: Power Build Up -- RechRdx(A), RechRdx(43)
Level 44: Temp Invulnerability -- ResDam(A), ResDam(45), ResDam(45), EndRdx(45)
Level 47: Maneuvers -- DefBuff(A), DefBuff(48), DefBuff(48), EndRdx(48)
Level 49: Glacial Shield -- DefBuff(A), DefBuff(50), DefBuff(50), EndRdx(50)
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Level 1: Brawl -- Empty(A)
Level 1: Sprint -- Empty(A)
Level 2: Rest -- Empty(A)
Level 1: Vigilance
Level 4: Ninja Run
Level 10: Chemical Ammunition
Level 10: Cryo Ammunition
Level 10: Incendiary Ammunition
Thank you.
Pow! Kablooey! Freem! Whiff! Bop! Zow!
Just as a general help to get you started:
1) Skip the shields and Frostwork, if you want to team, make a second build for that. Too much changes for defenders between soloing and teaming: which powers are useful, damage from Vigilance, end usage also from Vigilance.
2) Focus on slotting your secondaries. Damage is important but a little bit less so (due to Vigilance), accuracy is important but a little less so (due to inherent high Pistols accuracy, almost as high as Archery), so give a little more weight to recharge reduction, range in cones, and end redux if needed.
3) Don't slot for side effects on secondaries. Not worth it.
4) Infrigidate and Snow Storm is important to survive low levels solo. Snow Storm slows everything in a wide radius by a moderate amount. Infrigidate slows a single dangerous target (preferably a fire damage using dangerous target) by a huge amount. Use the two together when things get tough.
5) Infrigidate and Snow Storm need just a bit of movement slow slotting to floor things.
6) Infrigidate may or may not need recharge enhancement, because it does not stack on the same target. If you cycle it on 2 or more targets, recharge helps.
7) Slot Arctic Fog for defense for sure, and resistance too eventually. Humble as it is, that's your armor, and the damage resistance helps situationally. Stack with defense from Hover or CJ. +3% Steadfast defense is great too.
8) Consider Fighting pool and Acrobatics for more survivability and a bit of hold protection.
9) May not need Fitness pool, even soloing. Stamina is okay for 20-31 but Heat Loss obsoletes it afterward, thanks to its 90 second duration and 6 minute base recharge. Health is handy but Aid Self is better, especially since slowed and knocked enemies will almost never interrupt you.
10) Sleet changes the game for you in ways you can only learn by experience. So I won't explain what to do with it, I'll just say: Take it at 26 no matter what!
11) Do not take Stealth from the Concealment pool, Stealth turns off Arctic Fog and vice versa.
12) Snow Storm prevents enemies from flying, so Hover can serve as some protection.
13) You have too many big, important clicks to skip Hasten. Faster Sleet alone justifies Hasten in your build.
My power pool picks, in no particular order: Flight (Hover), Fighting (Box/Tough/Weave), Leaping (CJ/SJ/Acro), Speed (Hasten), Power Mastery (PBU/TI/FoN). If you take all of those, you have enough power choices left to take all six solo primaries plus seven secondaries (think ahead about which 2 secondaries to drop, I don't consider any of them must-have so pick 2 you don't like).
I agree with everything Rigel said. Boilerplate those must-have powers first in a character build and fill in the spaces with your more optional less important powers. Sleet is the real game changer. I would also point out that the DP nuke doesn't crash your endurance like a lot of nukes. Even then, with heat loss, it wouldn't matter to the Cold defender much.
Triumphant Defenders Forever
Psylenz FF/Psi, ArticQuark Storm/Rad, Symon BarSisyphus Bots/psn, Max VanSydow Thugs/Dk, Cyclone Symon Bots/stm, Blue Loki Ice/Cd, Widow 46526
HelinCarnate:OMG it is so terrible. I have the option to take 3 more powers but no additional slots. Boo F'ing hoo.
Currently, I have a Cold/DP. The thing is, I'd kinda like it to be /viable/ in soloing for when servers are slow.
So, I'd like to request a viable soloing build with SO's. Please.
Pow! Kablooey! Freem! Whiff! Bop! Zow!