I'm talking specifically to gear up a team. I have 2 sets of 85s, with a close 3rd coming up. I don't want to be playing them individually as that'll take 25 wins/week to get the conquest cap. Now I haven't tried boxing 2s or 3s, so maybe it's just as easy to win in 2s or 3s.

In 5s, the challenge is to wtfpwn 1 enemy before they've blown all defensive CDs and you start getting fearbombed left and right. The pace of 2s and 3s is a lot slower than 5s. In most 5s matches, someone dies in the first 5-10 seconds of every battle due to either a successful zerg or successful CCs.

But again, i'm not sure i'm answering your question. I do 5s right now strictly for the conquest gear. the arena system is such a joke in 5s these days, that I don't find the enjoyment from it, so I'd rather get my conquest points as quick as possible.