Healing with mouseover macros?

[Makeda]

I'm guessing my solution is going to come down to making a 'healing layoyt HUD' that just puts the party bar in the middle of the screen...

Is there a way to make that thing expand 'up' instead of down from where you place it, so it won't go 'off the screen' in a full party if I place it low for light parties?

Suspicious of this as even with:

/micon Cure
/ac Cure <mo>
/ac Cure <t>
/ac Cure <tt>
/ac Cure <me>

And my mouse right over the tank's line in the party frame... I've seen a heal hit someone else instead...