80->Unplayed account->2->3->4->5

by the time you hit 60 on 2-4 you'll have:
29 levels from 5 to give 4.
29 levels earned + 14 from granted levels from 4 to give 3.
29 levels + 21 from 3 to give 2.
29 levels + 31 from 2 to give the unplayed account.

Which gets you a freebie 60 the day your first team hits 60. If you are smart and don't grant from level 1 but rather level to 30 it scales even better.

(Someone check my math, I'm tired .