Can normal army take out Sphinx pretender?

[Gargoyle]

Thanks for all the input. I've played SP a few times now, but this is my first game where I am at or near the top in all the Score Graph categories (except dominion, where I'm just in the middle of the pack). I'm playing Machaka. I've used massed armies, black sorcerers, summoned undead leaders, troll court, Call of the wild, and magic and combat boosting items as my main strategy. I have Fire, Death, Nature and Earth mages of mixed skills.

I've avoided SCs as I have read that the AI doesn't know how to deal with them. I feel if I did concentrate on a SC strategy I would either lose before I made a good one or Win automatically if I got it going. Both these scenarios are not what I desire from the game.

But in this one instance of the Sphinx trapped behind his fortress walls, I must either create some SCs or dwindle its dominion to nothing.

So that leads me to my next question. With Temples and 3 lvl preist all over the place why is my dominion weak? Is there some other dominion boosting method that I am missing?