The only way is whaling.
This forum focuses too much on absolutely perfect teams... but uh, I shouldn't be the one saying that. I'm extremely guilty of that myself! Hundreds? Considering how each, random SSR Hime will cost you 200 bucks on average, try thousands. Probably tens of thousands for perfect teams in each element.That should be soon, but until we know exactly what Hime are in it, it's too difficult to say.
We'll have a thread for it once Nutaku releases the next one, we'll see then.