First issue.

If you make a keymap, the hotkey for the keymap causes the keymap to execute.
The wizard has created keymaps for you on 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, - and =.

Pressing Alt + 1, is not a hotkey for a keymap.
Therefore, it is not passed to any other clients.

But it does execute on the current/hot/active window.

To make this into a Keymap, open ISBoxer Toolkit.
On the top pane, expand Keymaps and click on General Keymaps.
Below to the left, right click on Keymaps.
Create a new Keymap, I'd call it Alt + 1, but any name works.
On the right, set the click the arrow thing and set the hotkey to 1 with the mod Alt.
On the left, click the + to expand the hotkey.
Under steps, click on the 1.
On the right, right click on actions and select Keystroke Action >>> New Keystroke Action.
For a target, select All windows, or alternatively select All of (The Character Set the Mages are In).
For the output choose 1 with the Alt modifier.

Note, unlike the 1 key (found in the FTL DPS Keys Keymaps), this does not include an automatic assist.
It only sends Alt + 1, to all windows (or to the character set we specified).

If you wanted Alt + 1 to FTL assist, we could do that by further right clicking on Actions.
And then selecting Key Map Actions >>> Do Mapped Key Action.
And then selecting Window: Current, Keymap: General, Mapped Key: FTL Assist Me.
You'd then right click and move it up ahead of the keystroke action.




You'll definitely want to assign PiP swap keys, its a major strength of ISBoxer.

On the top, click on character sets.
Pick a set beneath this.
I'd actually do this for every set, and assign the same hotkey to Slot 1.
With the same account in Slot 1 for every set.

On the bottom left pane, click on the 1.
On the right, the top option is Hotkey to switch to this character.
Pick something... I use G13. But Shift F1 or Control F1 works fine.
I'd avoid Alt F1, because Slot 4 would be Alt F4, which sucks to press in WoW.





As far as teams go, just about anything works.

If you want to do pvp, you'll want as close to the same as possible for arena.
Unless you're doing arena for the quick points and don't want to go far.

Battlegrounds, any group of 5 toons will work.
But again 5x the same, or at least 2x Class A and 3x Class B or something similar works better.

For questing any combination of 5 works.

For instances, you'll generally need a tank type.
Or to be much better geared then the gear the instance drops.
Depending on your class make up (can they heal in their dps spec -- Balance Druids and Elemental Shammies?)
If not, you might want a dedicated healer toon, along with a dedicated tank.
And three dedicated DPS.