Seek Advice for RAF Boost

[mph]

thank you very much for the reply, this clarifies things even more

please allow me some further questions, sorry to be a pain. i have read the guides but some are just a bit too "quick" and confusing for the absolute newbie..

1) same B.Net account but different wow accounts?
- to use heirlooms on the RAF toons, the RAF accounts need to be on the same B.Net account. but wow account is not the same thing as B.Net account right? how do i set up the 4 RAF accounts for ease of use? am i creating a second wow account with a different email address on which i have all the 4 RAF accounts and link that second wow account to the B.Net account? Or am i using 4 different wow accounts with 4 different emails for the RAFs?
- i use an authenticator which i think is linked to a B.Net account correct? so when logging into all the chars i would just have to wait for the codes to change / or write down codes before, then log into them sequentially?

2) ISBoxer
- I havent yet read an awful lot about it but i will definitely need it to make the boosting streamlined. do i need a keybroadcasting tool on top of it or is that included in ISBoxer?
- Any other software I will need to make this work?

3) Boosting
- Some guides say that 1-10 is best leveled with the RAFs just killing stuff until they hit lvl10, then move to dungeons. some other guides say 1-10 should be done with the booster in the party. is there a best way to do this considering that my booster will be lvl90?

4) Heirlooms
- Does the heirloom +XP actually stack with the 300% from RAF?

thanks so much again!
best
mph