Elsegundo is right.

Account 1 or your "booster" account can't be linked to the other 4.



As you can see from the screenie, I'm in Stocks, the pink haired bringers of death and the pimp daddy dwarf priest are all level 16 on 4 RAF linked accounts (1 vet and 3 referrals). The 80 druid in the upper left corner is on account 1, unlinked. You can see both the RAF and group experience is unchanged from before. Hope this helps.