It's just luck, I got Perkeo and Cryptid early, then two Invisible Jokers copied Brainstorm, which I had copying Perkeo during the shops and Baron during the actual rounds. I used the Cryptids to make a shitload of Red Seal Steel Kings, mostly because I was actually going for the Flush Five so I could get Eris, but I didn't get the Baron until like Ante 10, so I'd been basically living on Flush Five trying to find Astronomer in the shop (that's why I had so many cards in the deck, this is not optimal). The actual combo to get naneinf is Baron + Mime with this setup, but you usually don't use all the Cryptids like I did, you save them up and use like 50 of them all at once, but I never saw Mime despite rerolling about 1,000 times, with both Overstock vouchers. I got the money to do this with Reserved Parking.

All this to say, it's basically just luck, but look out for Baron and Mime, and work on making Steel Kings with the Red Seal, even without the Perkeo + Cryptid combo, you can get pretty far that way.

Unfortunately, the Plant kills this whole thing, because it debuffs all face cards, which are the only source of scoring by this point.