[bluefeet]

PF fine.
Flop - I'm not leading with a non-nut FD into a 6x PFr on a "scary" board like this (for him).

Working backward....

-Easy check/fold on turn
-Do not call his raise of you flop lead
-Do not lead on this flop. You MIGHT be able to call a small continuation bet. Where an Ace or King likely pulls you ahead on the turn, you have to exercise a little caution chasing the 2nd-nut-flush. Deep-stacked, I'd consider calling a 1/2pot type bet, reevaluating on the turn (I hate when people say this, but I don't see a point of running all the possibilities on the turn). Anything close to 3/4's or more...muck it and move on.