Pvp is: Play about 1.5k ranked games for the whole set, that’s it. About 250h conquest, nothing else contributes to that goal.

In addition: We don’t even know the full requirements for the open world armor yet. Maybe you need to do all the achievements as well. Maybe you have to finish the meta of the upcoming map 300 times. We simply don’t know.

The point is: you don’t have to do any of it to get legendary armor and you don’t have farm rifts for it either. Choose your preferred way or mix them of you want to. Nobody is forcing you to do anything of it. If you don’t enjoy any of it: build 8 sets of ascended armor for every character you play and you get a similar result.