[Nikelaos]

well twas a shame , i would be careful with that flying mage though, with such high MR it is more than possible that our friend will resist the spell and ultimately your flying mage will find himself 6 feet under.

it would be safer to simply wipe out most of the mandragoras with some skirmishes and evocation magic(or banishment) over a number of turns, then send in a few mages casting charm when it is much safer.