A logical conclusion might be that if you leave you wiz without guards, it is just the same as leaving him without the right spells. A careless oversight. A fatal one no doubt. Does the A.I. really need to compensate for human oversight?
As far as scripting (normal, non-mage) assassins - what can you do? Fire a few crossbow bolts and then close in for the kill, if you think you're facing a standard leader, and you've bothered to equip your assassin with a bow? (an unlikely combination, I suppose). Do placement orders work in assassinations, or does victim/assassin always start at equidistance to each other?
If you've empowered your assassins in astral magic, then sure, there are all sorts of interesting things that you can do
