Yeah, what LeoCop said.

Purphoros was a 1-of because I was asked to try him out. He probably would have been a 2nd Instigator Gang otherwise.
The only time I saw Qal Sisma Behemoth, he ate a Force of Will from my opponent. I like the Behemoth as a 1-of, but doubt I'd ever go higher than that since he is so mana hungry. That said, some decks just can't handle a 5/5. And for the rest he's just the ham sandwich to win with after sticking a Blood Moon.

You won't hear any arguments from me if you say Imperial Recruiter is a playable card in this deck. I do feel it is too slow to warrant spending $800 on a playset.
So I'm going to continue playing what I want, cause that's fun for me. And I'll keep reporting here for the same reasons.