[Endoperez]

I didn't try making Lord of War and Celestial General into SCs, but the amount of infantry they generate made it much easier to expand using archer-armies. You don't need to "waste" resources for the resource-intensive troops since you get those for free.

Baalz's posts about the Forge Lord in his guide for MA Agartha might also count. At least it surprised some people reading the guide. Blood Stones for 3 blood saves each, Rings of Wizardry for 12 pearls each... Innate 50% forge bonus!