[Gandalf Parker]

Attacking with a scout who has a Skull Talisman works well. The undead it creates helps hold off attacks while the scout checks out the situation to see who is left needing assassination. If the assassin is a mage you can also use the scout to safely store gems and occassional-use equipment.

Mictlan has an assassin god. A titan, with stealth and flight, who summons help during the assassinations.

Giving the Skull Talisman to an assassin is a cheap way to give them assistants during the assassination. Also it makes an assassin able to check for job-done fairly safely.

Pangaea has no assassin but does have Pans who can gather maenads to them each turn. With a Black Heart (to make them assassins) they will auto-check the province each turn. They will assassinate, followed immeadiately by an attack by maenads which will give you a nice view of who is left to take out.

Scripting a assassin who has magic with a spell such as Charm or HellBind Heart triples your assassins abilities.
A) He will try to assassinate a commander
B) If that fails then he will end up in one-on-one combat with the commander. He will try to take over the commanders mind. Set it for 2 tries (which is usually safe) and then combat actions.
C) If the spell works then the new converted commander will attack his old friends in that province. If he loses then you have both weakened them AND seen what is left. If he was the last commander then his own troops will rout from him which is kindof fun to watch. PLUS you get a new commander with all his equipment.