Quote Originally Posted by Kavhan Isbul
I am running the risk of going off-topic here, as I am not sure if my following comments will be any helpful to Indy1958, but I have found the Pope quite easy to assassinate, as he is usually a 0 rank commander, and a 4-star assassin has a 50% chance. Sending two 3 or 4 star assassins does not guarantee a successfull attempt, but you have a decent shot. Kings are harder to assassinate as they tend to have some command stars. Any ruler over 4 stars in mu opinion at least is pretty much invincible to assassins.
There is something working pretty well: you send tons of assassin, from the same province to the same target, it usually works. If you send 3 which fail, you will usually have a tougher target afterwards. But if you send 15 and one succeeds, too late to have bonuses!