If you're leveling under RAF, you probably want to bring at least 2 teams to 60 to get yourself enough alts for a lifetime. That'll give you a third team grantable to 60 and is only a couple days playing time under RAF. I'd keep the team together rather than loose time and the RAF bonus. If you really want to switch out ASAP, start a new 5-man team and get them to 20 before the switch. Getting to level 20 under RAF should take all of 2 hours.

If you're not leveling under RAF, stop. Level under RAF.