The easiest concept to get...ever
So here it is, you stop going into PvP with the 1v1 mindset and start thinking of it as a dungeon with realy hard and smart (up for debate) mobs, you join a group, same as any dungeon, 1 tank, 1 healer, 1 support and 2 dps, you activate target-of-target in settings and everyone targets the tank, now you are all hitting whatever the tank is targeting without ever needing to switch targets (except for the healer and possibly support) then you target heals first, dps second and tanks last, if there is an oblective you try to let the tank grab it and you roll through EVERYONE running around in disorganized pug PvP with barely any losses and win constantly.
Here is the best part of this idea, no class...not a single one...is OP because they all drop within seconds to the concentrated awesomeness of your team, you could even mix it up and stack multiple classes in your group and get WILD with it.
In some games PvP is balanced around 1v1 PvP, well no thats not true, in ONE game thats true, but in all the others it is balanced against group PvP and in those special games you have to work as a team to avoid being killed instantly by the class that is really strong against you, or not being able to kill stacked healers, whatever, try it, you might like it.