Lone Wolf is interesting for players that are playing on hard difficulty, because of the HP and chance to hit penalty. If you are not playing on hard difficulty, Lone Wolf will significantly weaken your party.
Even on Hard. Don't get me wrong, it's where Lone Wolf is at its best, but even its best doesn't justify the lost AP of a companion. Picture of Health and Glass Cannon for everybody is min/max 101, as far as I'm concerned, and LW isn't needed to make GC work on Hard.
