@Meddler: I'm designing a Champion who uses Rumble's Heat system. Any thoughts?

Yep, more to ask you. You are the guy to speak to, though.

I'm looking to breathe some life into a big guy who got ousted by Elise's big bad spider god a while back: Ebonmaw. With the lore retcons going on, I was able to take a rather interesting approach with him.

http://img2.wikia.nocookie.net/__cb20110403195054/metroid/es/images/e/eb/Omega_Ridley_rip.png
(just for reference; not exactly what he'd look like; I don't take credit for this artwork)

Needless to say, he's itching for a fight.

In making him into a "mechanized Dracolich", I decided that he would use the same Heat resource that Rumble uses. However, that resource is tricky to work with, so I was hoping for some of your expert insight.

Concept link: http://boards.na.leagueoflegends.com/en/c/skin-champion-concepts/RMnR5Jth-ebonmaw-the-terror-of-zaun