You know, now that I really think about it and considering the other Judgements I've tried out, this is actually a fair assessment. I have T4 Cryonic unlocked and I use it occasionally, but I ended up unlocking Pyronic as well for the nice DoTs and mainly use that instead for a second nuke. But you're right, if the goal of the power selection is primarily damage output, Cryonic is likely in last place.