Hit 90, unlock flying, go to timeless Isle. There is no reason for heroics other than achievements now. Just farm elite and rare mobs, do the quests etc and save 20k coins to buy your weapons. Then you will be raid ready if you're looking for that or trying for the legendary cloaks. 496 epics from Timeless Isle over 450 blues from heroics. Every mob on the island is soloable and most of the elites are as well so you will crush the island.