I'll be returning to 20-29 bracket some time next month, long after the invasions cease. I understand that PvP scaling revolves around item level. Do the invasions give players exclusive, best-in-slot items for PvP? Would those joining afterwards be at a (significant) disadvantage for not being a part of the pre-patch? Any good class/spec that is designed to be played at a slower pace - something that is far removed from twitchy, "spam-y" play style?