What do you want to do with your points (redeem them for airfare, hotel stays, cash back)?

It also depends on where you're based (an airline hub city or a non hub).

In any case, you seem to be racking points nicely. I'd get a couple of flexible cards for starters (Amex plat, chase sapphire preferred, Amex blue cash preferred), and then apply on a per-bonus basis, depending on the available offers but keeping the "main" cards mentioned above.