How well would my yugioh deck do in regonals???

it'll do ok, i recommend losing radiant mirror force for mirror force, along with adding in Cyber dragon and since you're running macro cosmos consider use of Helios the primordial sun, Helios duo megistus and helios trice megistus and maybe even golden homunculus, bazoo the soul eater and chaos Ruider gustaph, this deck might get you fairly far, but wont win the regionals