Finally I can post!

[Selby]

EDIT2: Also, I realized no one replied to one particular part of my original post.

"I see the incinerator as similar to the Inferna from The Suffering -- super-fast, with a Blaze-like effect (shoots inferno spell out its rear during movement?) and ability to create sudden, deadly kabooms. Can this be done?"

Of course they addressed it: if you can code it, it will work. Honestly everything you describe wanting to implement sounds like it is going to involve some work, not a few edits or pointer changes.