Yeah, you can, you're right. They need to be really close, and having a magic-using Creature helps a lot, yeah. I used this a bit in the flying fortresses, but forgot to update my notes. My error \:\(
I understand.
It's really boring to do... Long, deadly and not fun at all... But that give experience ! There is no respawn and you're limited in experience... Mind-reading is expensive in that condition and that's great. In that game you don't have "unlimited experience" so you must be careful with the mind-reading and the reward. My warrior was level 35... I killed everything, train in farglow arena until level 3 (after the level 3 you didn't gain more experience with the gobelins but you can take "wisdom") and merely never used the mind reading (only for the most useful)... Level 35, more than three days of game in the deepest way it can be played just for experience... Never a game make me do something like that and hesitate so much on something like "I read her mind or not? The weapon will be good enough or can I find a better soon? Experience or money?"
So in this conditions... Wyverns Must Die for your sake... Even if you take something like two hours on it. (They seem to respawn... I'm not sure of it but sometimes there some even if you killed all of them)