You need 6*s, not a chance at better ones for 50% more. Seems good on paper, but the truly gamebreaking champs for you at this point boil down to Apoc and CGR. Everyone else will be okay, but not a game-changer besides maybe Ghost.. And you might get Green Goblin. Better to go for a basic. Every time a new featured 6* comes out, the pool gets a little better...by now, you have a half decent shot at something good.