could this deck maybe play Wild Nacatl and/or Gallia of the Endless Dance? I've liked gallia in these shells before as a card advantage engine to discard a land or something for gas

I like both of those creatures a lot! Gallia would probably be amazing for feeding goyf and delirium in particular.

Theres also maybe potential for Inti, Seneschal of the Sun or Amped Raptor type builds? although raptor not getting a trigger off break out is annoying but you should always have enough other break out hits.

those are also awesome cards... I think i GOTTA try that Amped Raptor card... looking at spoilers hor MH3 i just saw the symbol and my eyes glazed over and i just dismissed it... but the combo of first strike and a Break Out minus the haste/selection just seems pretty dang great.

Yeah the card doesnt need any energy support which is why its so busted in the right shell