The last two powers of thermal really are quite nice. You may also enjoy melt armour (which I went for) which reduces there defence and resistance. When these two powers get combined you really will become something else.
Can't wait 
Heros
Max Powerz: Lv 50 Tanker
Villains
Max Khaos: Lv 50
Overlord of E.V.I.L.
My Brute - http://maxy-khaos.mybrute.com/
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I have taken every thermal secondary power, because there doesn't seem to be a bad one among them. Melt Armor for the set. 
I think I might have to start playing my Fire/Thermal Corruptor again Level 16 so far.
I certainly don't have problems finding teams and can solo without any problems.
I don't know if you noticed but we (Radiation Freak & Stryker) had a couple of skirmishes in the Sirens massacre event. Well until we got swamped by heroes. 
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I think I might have to start playing my Fire/Thermal Corruptor again Level 16 so far.
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Stryker! hey its shiver, i got a couple of corrupters, wanan team up again>
Union-
HEROES
Shiver . Ice/Empath Controller
VILLAINS
Necromozone . Necro/Dark Miasma Mastermind
Tils - Bane Spider
[url="http://i38.tinypic.com/spavbl.jpg"]http://i38.tinypic.com/spavbl.jpg[/url]
Thirded. Just hit 35 with my Rad/Therm and got this power. Even with 1 slot (acc) it's great and highly recommended. Can't wait for Melt Armour.
Anyone got any thoughts on slotting for this one though?
Yeah I finally went for 2xAcc, 3xRecharge. You want it to recharge before the effects wear off and you don't want to miss.
Hm... I made a Rad/Thermal on the first day of CoV, mainly based on how good the later powers look, but I've pretty much stopped playing her. She just doesn't feel anywhere near as good as my other two Corruptors, so far, and I've been worried that she just won't be much good in PvP, which is where I'm spending a lot of my time lately. Is it possible she'd actually be quite good in the later zones, though?
PvP isn't my cup of tea, but in the limited trying I have done you have a few useful powers.
Cosmic Burst: nice 100% disorientate, assuming they don't have protection, good for dropping squids
Heat Exhaustion: nice for -regen, -recharge, -end recovery
Melt Armor: AoE -def, -res
and of course two heal powers, I found in a team I can be good backup until I am spotted at which point I found it very hard staying alive against anything with holds or armours.
In PvE I can solo without too much problem, although I rely on Air Superiority and Cosmic Burst most of the time. In a team there isn't a secondary that I don't use all the time. Heat Exhaustion alone renders Longbow Bosses/Elites a lot less risky.
Edit: If you can team with 3 brutes and a kinetic, you do become pretty unstoppable.
Is this power awesome or what!
I hadn't really thought about its effects when teaming, I just popped it in to bosses, elites, AVs and assumed it helped. It was only when using it solo I realised it makes pussycats out of a lot of bosses and I came pretty close to taking a Longbow Commander Elite Boss down with it solo.
Take this power it is great!
For those not aware it is -dmg, -regen, -recovery the last seems to be the most important as they are left a lot of the time with no endurance.