My Rogue is the first to be leveled, and I'm starting on the Tillers rep grind. I'll do the Direbrew event and I turned in the Claw for the epic boots, but I'm probably not going to focus on progressing this character right away. I really only leveled this character first to get Motes of Harmony farming ASAP. Likewise, my Priest is my next focus, my Pally next.
I've found that simply questing yields a fantastic amount of XP, along with a bit of gold and some fun items. The gear stays current enough that I bought very few pieces of adventuring gear. On my Rogue I went north from Valley of the 4 Winds through Kun-Lai into Townlong, completing every quest. Doing so, along with a bit of gathering, got me to ding early in Dread Wastes. I'm sure I'll finish the zone eventually, for the rep or the gold or just out of a sense of completionism, but it's officially backburnered and my Rogue is now primarily a crafting alt.
I'll level my Priest next, since it's the next character that I want to farm Harmony with, and I'm planning on sticking with dungeons. I expect to need more of that adventuring gear.