Porth Ysgo does dry quickly if it is windy, and it rains a lot less there than anywhere else in the area, but it is always worth checking the surfing webcam for Hell's Mouth first.
http://www.westcoastsurf.co.uk/surfreport.htmFailing that, and assuming it is actually raining, your best bet is Hylldrem which stays dry, even in torrential rain. The best independant lines here are V4s - albeit quite powerful ones.
You are right about Parisella's - to appreciate it, you need to be climbing at least V5. There is quite a lot to do below V6 though.
Looking at the forecasts, I would risk P ysgo tommorrow and see what Saturday brings - they'll probably change the dodgy looking forecast by then.