Depends mostly on the Ld of the afflicted model. If their Ld is high then just keep using them as normal. Chances are they won't often fail the test after being wounded, nor the tests once transformed to stay under your control. If their Ld is low however, then I'd be sure to keep a lot of distance between them and your other warriors. Run them in solo suicide-style. Once they take a wound they've got a good chance of transforming instead of being injured, at which point if they're surrounded by enemies they'll have a great time with their new friends.