I suggest you consider the possibility that lowering the price of Fire Crystals may make more people actually buy them, so many more that you end up draining considerably more Energy out of the game.
I like the Forge. It's something to do where I see progress, and I might get something nifty. (Not that I saw another Forge Box beyond the first one early on after the update, but I might get one every time! :) )
Paying Punch might be more effective to get him to do an UV, but that's no fun. I do have fun with the {Forge->possible box->possibly an UV Ticket} way.
I am heating all sorts of armour that I initially made for costume purposes only, simply to do Forging. Radiant Fire Crystals come a lot slower than Heat though. Then I look at Supply Depot and think, 50 crystals, 700Energy, No way.
If it were the full number needed to forge the last level, for 400E, I'm sure I'd grab some now and then. That's 400E drained out of the game now and then, versus 0, ever, on Fire Crystals.
(Or maybe I just made too hats and coats for costume purposes. But this thought kept bugging me, and I'm the talkative sort. :) )
Oh dear, I should call a GM so he just gives you my 2000 radiants I'll never use.
Yeah, you're trying to heat way too many costumes at once. Fire crystals ARE everywhere, or at least radiants. Most people only get stuck with shinings.