Hi sorry if already posted but did not saw this in first two pages so giving it a try:
In WoD, PvP Gear is low itemlevel, but has an effect to greatly increase its ilvl while in PvP Combat (to 690, Mythic Raiding is 695)
My suggestion is that you can buy a 2nd Account with LV90 Boost of the opposite faction, start Combat with your Main, and then just camp that char near your main to get an increased ilvl for soloing Elites or AoE Farming fast-respawning mobs etc.
You could chargeback the money a few times and purchase additional accounts to recreate this trick.