I only see one problem with this method: Battle.net transfer lockout.

Unless you have a spare slot on your BN account where you plan to transfer the level 55 from to account E, you won't be able to transfer to the new BN account for the 30 or 90 day period (I forget which it is). You will need at least one 55+ to be able to make the DK on the E account, so you'll need a transfer or quick leveling to 55. Luckily RaF can span BN accounts so it doesn't matter if A, B, C, or D are on the same BN account unless you plan on transfering characters off after you boost them.

Personally, I think the method Ualaa mentions with the two vanilla accounts is the better method, especially if you picked up any of the Black Friday accounts for $5. It isn't the fastest, but it works with existing accounts so you don't have to worry about maintain new monthly fees, BC and Wrath upgrades, or waiting and then paying for character transfers. The big downsides are having to spend twice as much time boosting and have a lot of throw away 60s sitting on those accounts. Also, you won't be able to boost a whole team at the same time. This could be an upside though since you don't need to activate all the RaF accounts at once and if you can't get it done in 30 days, you only need spend the cost of a new Vanilla account to get another free month of RaF.

Hope that made sense.

- Souca -