I'm currently using 25 psi in the top (negative) and 70 in the bottom (positive). I'm about 120 lbs. This setup gives me exactly 3.5cm of sag. In other words, when I stand on the EUC, the pedals drop 3.5cm. I set this up this way based on mrelwood's advice. It feels good but I haven't ridden it enough or tried enough other settings to say it's the best, but I think I like it more than the few higher PSI setups I've tried.
By the way, I know George from the post above this one has changed his settings to 30 top / 90 bottom from one of his more recent videos.
I'm interested in how other lightweight V11 riders have their suspension setup.