4 Box lvl 60s

[Rejuvi]

K so im at lvl 60 now and am 4 boxing Shamans through RAF so Im no longer getting triple xp. Im currently upgrading from 2x 1GB RAM to 2x 2Gb RAM in the hopes the extra ram will allow me to play my 5th account for my geared pally tank.

In the event this does not work, how do you suggest levelling. I know its been super fast getting these guys to 60 but im worried its going to be unbearably slow getting them to 70. Any tips that dont include instances?

[Sanctume]

Quest for Level and faction.
Grind instances faction.
Daily for mount.

[Thulos]

I leveled entirely through instances with my shaman team with the exception of levels 1-10 and 55-58 and I can tell you that It is mind numbingly boring and that you will want to murder someone by the time you are done. Everytime I think about boosting I want to break something. If I was you I would mix it up and do both quests and instances and try to enjoy the journey as much as possible.