If you have a hefty supply of gems, gift of reason 1 tarrasque then summon 3-4 more - by itself a pretty hefty army.
I like doing it with iron dragons more just because of the flying - 5 iron dragons is pretty brutal (125 earth gems + 20? for gift of reason = brutal army). dropping that on archers or rearmost does wonders
Yeah, but if you GoR a Tarrasque you can Empower it, too. I'm going to try this in my current SP game (I'm winning but it's grindingly slow because the map is so big). Maybe I'll Prophetize him, too, for kicks. (Idea from HoneyBadger.)
-Max
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Bauchelain - "Qwik Ben iz uzin wallhax! HAX!"
Quick Ben - "lol pwned"
["Memories of Ice", by Steven Erikson. Retranslated into l33t.]