Mighty Ai

[Nick_K]

Or the human could give themselves a similar starting situation to the AI. Try taking an AI-style pretender: a chassis that is not appropriate for SC work, no level 9 bless, problematic scales.
The AI's usual bad setup goes quite some way towards nullifying benefits from the difficulty level. Have a look at some AI scales, then try playing with them. See if you can still beat the high difficulty AIs with a weak god - it's probably not realistic to expect massive improvements in AI design unless, as gandalf suggested, someone goes through all the hassle of making a specific map.