Make two action target groups (ATG):

ATGstarfire
ATGwrath

Make a hot key, called on by Ctrl F1, that has two steps.
-FIrst step: have the druid in question leave ATGstarfire and join ATGwrath
-Second step: have the druid in question leave ATGwrath and join ATGstarfire

On you "2" key, have it do two key map actions

Send "2" to everyone in ATGwrath
Send "3" to everyone in ATGstarfire

voila