Only mapmaking, please no solutions requiring modding.
1. Is it possible to force an +1 upgrade using triggers somehow? The intention is to have gradually upgrading opponent, preferably all the way up to +5. (I do remember Spellsword preventing an 'forbidden' upgrade even though player could have tech, button and resources for it. It's probably not related... but maybe?)
2. Will any AI upgrade past +3 under any circumstances?
3. Can I lock some tech after the game already started? Let's say I want player to be able to choose between 'commanders sc2 coop style' and want to prevent them from building some units, but I do want them to be able to mind contol and use them as well. Removing tech structures as soon as they build can achieve it, but what if I wanted to disable a Zealot for example? I would also like to prevent mind controlled scvs from building, but be able to repair.
4. Can I give units that normally don't have abilities access to them? Let's say Archon with Psionic Storm?
None.