I'd take a look at IS Boxer, as your software solution for boxing.

The wizard will get you a working start point in under a minute.
There are several videos for IS Boxer.

In addition, you can configure/change the defaults in a lot of ways.
My guide (see my signature) is a walkthrough of a lot of changes.
Which get you the idea of what can be changed and how.
It's basically a starting point for changes you want to make.
But you can play with the default set up the wizard gets you, without any changes.

It gets you auto FTL.
Just drag wow spells from the spell book to the action bars.
When you press 1, each toon casts the spell on 1, but at the target of the active toon.
No wow macros required.

When you want mouse broadcasting.
For say Hurricane, Blizzard, Mass Dispel, etc.
IS Boxer is very strong in that regard, turning on broadcasting for a click and then turning it off automatically.
Plus you can manually turn on broadcasting, which is another very strong feature.

You won't find a better way to heal then via Repeater Regions.

It offers a lot of power and flexibility.






For the RAF.

You have two accounts A and B.
And have added three accounts.

So A -- C -- D and B -- E.
C & D are two new accounts, attached to one existing account.
And E is another new account, attached to the other existing account.

You could have even gone:
A -- C
A -- D
B -- E
Makes no difference.

If all five are grouped together, you'll get RAF at the same rate across all of the accounts.
Assuming they're all the same level, and grouped together.

If you are boosting.. as in one higher level toon, quickly killing things for the lowbies.
You'll need to ensure the other four accounts are all RAF linked to at least one other lowbie account.

So:
A or B is your booster.
The other has a lowbie who is being boosted on it.
If your link was... A -- C -- D... and B -- E... you can boost with A fine, but not with B.
If your link was A -- C, A -- D, B -- E.. then you cannot boost, since C/D/E are all dependent on having a lowbie on A/B grouped with them.