bob the 6th wrote:
attacking with your overlord is like capturing with your king, hard, effective, and suicidal
Capturing with your Queen, on the other hand ...
Following that by taking out enemy siege would leave Stanley in the open to be croaked by any of the coalition's archers and remaining archons and we know Charlie had quite a few in the general area.
... case in point, if Wanda
had pulled those maneuvers, she couldn't have failed. She was prophesised to get the Pliers after all, wasn't she? So Death would strike unlucky unti she got the Pliers, and then even more, cause UltraZombieMakeMachine Mode Ac-ti-va-teee!
Of course, Parson didn't know that at the time.