Findsmen are interesting because they fit in interesting ways with Mindlink.
I have really very little idea of how wave 10 will impact the meta - there's definitely some very potent stuff there, but as ever, my suspicion is that the stuff that seems loudest and shiniest and scariest... will actually mostly not have THAT much impact, and the things which seem pretty quiet but add hugely to reliability will be big.
I'm feeling Captain Rex being something of a sleeper hit.