Yea, btw. Scripting SC for retreat might auto-kill him when he's earth-attacked or something. But your opponent has to guess that you will retreat, otherwise he just wont cast earth attack on a supercombatant. Sometimes, Dominions reminds me of poker.
so how do you get past an MR of 19 anyway? Do penetration items stack with each other? If not then even if you had a S9 mage with a eye of the void your soul slay bonus would still only be 15. Beating someone by 4 on a 2d6 roll doesn't happen very often.