Don't bother trying to kill Miuna in Rendezvous EX. Once you kill the two golems she dies automatically.

Update:
If you are having a hard time killing the golems fast, grab a Laharl mercenray. On his first turn charge up and move to the right and down one step (left should be fine too since mercenaries start in the middle). He then gets blocked by a fire thief that your other units have to kill before Laharl's next turn. This is Laharl's second turn with only the Laharl mercenary leader skill. I was trying our Roxanne so her leader skill doesn't help with Laharl's damage. Please note that if you center the attack on the square in front of Miuna you can get the wolf on the left as well. I took the screen shot before before fixing this.