You swap 1 Polymorph for 1 Arcane Blast
That I am onboard with, I think I'll do that ASAP, thanks.
and probably 2 Twilight Elders for 2 Flamewakers.
That I am not so onboard with, from my (admittedly simplistic) viewpoint, the Twilight elder has a the benefit of buffing my Chtun, and also, from the games I've played, it almost works like a taunt, as much of the time the opponent will focus on getting rid of it as soon as possible (which I understand negates much of the cards Chtun buffing benefit if they clear it quickly)