I need some advice. I have created a Robots MM that's theme (and name) is fire-based. I want to pick Thermal Radiation for the secondary powerset, because it fits his theme and backstory better; but I want a MM that can solo well all the way up to max level. I love grouping as well, just like to play in short time chunks a lot. Everything I'm reading seems to indicate that /dark, /traps, and /time are awesome secondaries for Bots.
Can thermal be "really good"? Even if not the most powerful secondary? I really don't have to be "the most optimal", but I can't stand gimping a character either.