[Gandalf Parker]

I prefer seducers. Not only knock out one of their mages, but gain one at the same time.

Altho the seducers have been greatly increased in number, they seem to have gone down in effectiveness. A failed seduction becomes a 1-on-1 combat, like an assassination. So you can deck them out with lots of equipment so they can kill the target.

But the BEST thing I have found is combining the two actions. With Arcos Oreiads for they often have 3 nature magic so getting Charm is great. Set their script so that if the seduction fails they do 1 attack (to move forward) then 2 Charms, then move into kill mode. An advantage is that it will also work on females. If you charm the target then a combat will occur in that province with your new commander fighting their old comrades.
If its the last commander in that province then you get to watch the commanders old troops rout which gives you the province.

With Succubus you can do the same taking advantage of their blood magic and using Hellbind Heart spell.