PVP Assassin questions

I decided I want ot make a good pvp assassin. I have all of the gear.

havoced .08 bugged valor
havoced stormshield
chamed .08 gaze
11% ll ring
ITH Claw (40% ias)

I need some help on the rest of it.

First off, how much additional ias is needed to achieve the cutoff for an assassin?

Also, how much fhr do I need to prevent getting block locked by all of those 7fps zons? I have read several guides and they all seem to say different things at different times. So it woud be great if someone would be able to give me a straight up answer like 80fhr or something.

Thanks