I can't speak to primal, but I know Aether is good for frontlines pops. I'm on adders and most nights we usually get a pop in 5-15 mins depending on when you queue. Anything 20+ mins is rare (although it happened last night, possibly because of the holidays). I haven't done wolves den in awhile so it's likely pretty dead, although I know people hold pvp nights every so often. If you're planning on staying adders, we've got an active adders frontlines linkshell on faerie and I know Balmung has one as well.

If you're switching to flames there's a really good linkshell on Sargatanas. I don't know of any active Storm linkshells but I'm sure they're out there.

I've heard the Japanese data centers have the fastest PvP queues, but basically everyone there speaks japanese and if you're in NA/EU your ping is going to be terrible.