Yeah, optimal is right. Plus, there's no infantry in this combo—only ranged units, and mostly magical ones at that. And what if they have resist? Golems-Djinn_titans—that' same the most ownage imho. Golems are tanky, 50 hp I think + magic resist + dwarves—so there is infantry. Hots+titans—there are archers. Djinns are powerful casters—they are a must-have. And dragon golems are just awesome, though their retaliation before the attack is pretty good...
I personally doubted for a long time between barbs and chaos—voted for barbs, because there are unfairly few votes for them. Barbs rule; a level 20 barb with fully upgraded combat+resist burns everything down, especially if stormbirds with their wild growth are already built—a powerful castle. Chaos is also strong + powerful magic, but they already have plenty of votes=)
And in general, Long live anarchy! Punks HOY!!=)