[@Demon Shinobi]

Truth being said, the only thing he has at the level of a high class devil is his physical prowess (Thus "barely reaches"), as he would mostly be unable to effectively damage a high class devil with pretty much anything else, as his abilities are hardly useful against stronger devils at this level. Still, I suppose I can nerf him down a bit more. That being said, I can't really understand you complaint about magic, as most of his magic-like abilities (Golden Aura, curse and treasure shining)) are abilities directly inherited from Fafnir and the sole magical ability externally learned is Dragon Gate, that is kind of necessary for any Dragon but hardly useful when his capacity of using magic is restricted by a curse.

About his strength and outrage, I'm fine with making clear in the cs that his magic-like abilities are around the mid-class but his physical abilities are a no go. I can, instead, lower his physical abilities to the average of a high-class rook without the promotion and I'm fine with nerfing outrage to put him above high-class but under the supreme class, to make it a bit more fair, but anything under that is kind of too much. I mean, he's a fucking Dragon, supposed to be a cheat-like existence. About the pieces, that was quite the headache for me too, as I don't know if they would consider his original power level - requiring more pieces and mutated pieces - or would consider his curse. In the end I kind of imagined that it would be the first, as his power is still part of him even if he can't use all of it. That being said, deciding the number of pieces was still a bother as he was originally a Queen, so I'm fine with settling with four with a single mutated piece, as even if he does recover his power it would be fine just mutating the others. 


P.s. He wouldn't betray you, you saved his precious life... No, wait, maybe if a nice treasure was involved he could betray you a little...
Still, he isn't dickish like the original Gilgamesh, just... Free-Will, bitches!


P.s. Part 2: If you're really thinking of changing Tsumiki, I'd recommend using Belial's clan. Their unique ability is so freaking OP that it even hurts, turning anything the other party uses worthless as long as they retain enough power to do so.