Man You must have one hell of a stretch on those rears with 265's on your jade r's fella!!
I've had a few different wheel and tyre set ups, ranging from 315's to 275's on my single with the jade r's.
The falken 452's 275/30/19's, are by far the best tyres I've had so far, 315's being the worst would u believe it.
Unfortunately with any single in the wet it's pretty pointless to even attempt to drive hard....lol
Your suspension set up is just as important as the tyres when u start chasing the big power, biggest mistake I did was to make the rear set up to hard, for a long time i could wheel spin through into third it was that bad ;-)