ISBoxer mouseover healing question

I need help figuring out how to effectively heal while tanking in a 2 or
5-boxing scenario. Right now I've been using simple macros per character while
messing around zg and mc, but I'd like to have a go at tanking and healing
heroics.

As I raid and pvp with the druid I'd prefer to heal the same way if at all
possible and right now that's using vuhdo with mouseover macros bound primarily
to the d-pad on my n52.

It looks like ISBoxer with mouse regions would do the trick. The problem is that
I have abilities bound to the same keys on my paladin which I don't want to
trigger as I heal, so I cannot just pass these keys along to the slave.

For example: the rightmost dpad button is bound to swiftmend on my druid and
divine plea on my paladin. But I don't neccesarily want to pop divine plea as I
use swiftmend.

Any ideas?

Bind it to another key?

I'd suggest using Clique and instead of using mouse + keybind just click the unit you want to heal with the appropriate button...

My setup is left = chain heal, right = riptide, shift left = healing wave, shfit right = lesser healing wave, ctrl left = dispel, ctrl right = turds, etc...

/stopmacro [target=mouseover,help]
/cast divine plea

totally untested but should not cast divine plea if you are mousing over a friendly target