I have a demon summoning/thermal and a necro/thermal. Flaming zombies is a concept that is hard to beat 
. They aren't the most rare, such as trick arrow, but thermal is relatively new to the mastermind sets.
The thermal shields on the robot bubbled minions should work very well. You have an AoE heal and a nice single target heal in thermal so you don't need Repair and your single target heal works on teammates, too. Forge is a nice power to increase your pet or teammate accuracy and damage.
I skip the resurrection or put it in a different build for TFs and raids. Heat loss and melt armor are very useful. It's too bad they come so late in the development. Thaw would have little use on robots because they are fairly mez proof, but it would be a bonus on teams for dominators, corruptors, and other masterminds.
I think thermal is a very useful set, and it only gets better as you level up. Give it a whirl. You can always re-roll, but I don't think you will.
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.
Is it a set people rarely play or something? If so, why? I was looking for an interesting secondary to try out with a new bots MM, (is necro any good in comparison, btw?), and couldn't find a single guide for it on the thread.