Does no one remember how crazy it was to try and level Arcanist when it was the new hotness on release? The only advantage there was that people would switch to SCH at 30 so they could get insta-queues as a healer. Rogue and Ninja will not benefit from that.

My recommendation is to find some friends and group up, taking turns as ROG / ROG / Tank / Healer and just forget about the Roulette bonuses. I did two hours of leves + FATEs last night, queue never popped, and I went from 15 > 20 in that time before giving up and going to bed.