From what I know people dont go pyro for pvp because its just straight damage with no cc. I can see linker as maybe some help in cc, but from I hear, this is a pve build. Your linker is going to help your pyro do damage in pve. Whats going to be your saving grace in pvp is your sorc class. I say go full pve and change summon familiar lvl 10 to lvl 2 and max salamion. That way your not wasting tons of mp just to be relevant in pve.
Its a decent hybrid though, just not great at either pve or pvp.
I’m not too sure about the featherfoot, but there’s a reason warlock gets higher rankings in pvp than featherfoot. But featherfoot will definitely help you solo.