Until they "fix" the level issue, my suggestion is this (based on your desire to get a number of teams during the RAF time, and not caring about which of the two current accounts get the zehvra mounts):

Use one of your two existing accounts and refer ALL THREE from that one. Use the other of the existing accounts to boost 4 (all linked via RAF) for max XP in the shortest time. I just ran a group of 4 shaman to 60 in just under 18 hours /played, then used the "Grant A Level" to make a shiny new level 60 Paladin.

Account A: Booster

Account B: "Veteran" Account

Account C: Linked via RAF to Account B

Account D: Linked via RAF to Account B

Account E: LInked via RAF to Account B

You'll have a crap load of teams before the 90 days expires, I assure you.