Sell all your third-party flashes and triggers. Pick-up a couple of SB600 and use Nikon's CLS.
I read that article too and IMO, if you’re really, REALLY into off camera flash (I’m talking it’s your bread & butter and your photography style is sensitive to 1/3 stop) then m-a-y-b-e a 1/3 drop might be a small nuisance. Practically, I doubt you would notice for most cosplay photography and you can use FP mode (If you get flashes that support it) anyway.
BTW, the mighty 5D Mark III has a flash sync of…yup 200.