You could always create a cast sequence macro, something like this:

/castsequence [target=toon1] Power Word: Fortitude, [target=toon2] Power Word: Fortitude, [target=pet1] Power Word: Fortitude

Then do a similar cast sequence for your mage's Arcane Int. You'd just have to press the button a few times to buff your whole party.

-Please note this is a psudo macro, since I'm at work and can't verify syntax.