keep in mind you can only summon while the accounts are linked (90 days), after that its gone. What I did was level up 4 warlocks to 20 (hand level to 10, then got gifted to 20) and have them parked around the world with bags full of shards, that way even long after RAF goes away I can move them around and use them as summoning slaves. Ones in shattrah (although I have a mage so not as useful), ones right in front of scarlet monastary, ones in front of BRD, and ones at LHC.