The easiest way to control 2+ toons is with focus based assist.

With a two toon party, create two macros for focus.
On both toons.

Have them on the same keybind.
When you press the keybind for #1 on one, they both get it, and the same for focus macro #2.

/focus [target=ToonA]

and

/focus [Target=ToonB]

Then your attacks can be:
/cast [target=FocusTarget] Judgement of Light

Heals can be:
/cast [target=FocusTarget,Help][target=FocusTargetTarget,Help] Holy Light

Follow is:
/follow [target=Focus]

I'd bind a key to Interact With Target.
And enable Click to Move (mouse options).
Do both of these for both toons.

In PvE, press IWT once (and again if the mob moves).
And spam your dps moves once in range.
In PvP, you'll need to spam your IWT key to stay in range.