Rogue Warlords

Warlords, massive godly constructs, have been set free upon an uninhabited island in order to do battle. Summoning troops, and emboldening them with upgrades, the last warlord left standing will be recognized as the strongest by the gods. Combine RTS combat with roguelike elements to create highly replayable and strategic action. Summon troops and purchase stacking upgrades to create a massive army of incredibly powerful troops. How massive of an army can you create?