House Rules against the AI

[Makinus]

I nearly exclusively play single player against the AI and i use some House Rules to give a "fair chance" to the AI, i´ll post my house rules here and i´m curious to other house hules:

1. Always use a Imprisioned Pretender.
2. Only attack an AI if attacked first (you are free to attack independents).
3. Only 1 researcher per lab.
4. Do not use battle spells that need gems.
5. Do not use global spells (You are free to Dispel the ones the AI casts).

By using these house rules and setting AIs to Difficult i find the SP more of a challenge...

So, any house rules against the AI that you think are fun?