Lone Wolf is crap. Seriously. You get +2 AP (which you then double to +4). But you lose, at a minimum, 6AP which would be on the companion (more realistically 12AP, because Glass Cannon). Plus 4, minus 12 is a crappy trade, especially since it actually costs a talent. The best way to describe Lone Wolf is that you take Glass Cannon's effect and invert it; Lone Wolf should be called Antimatter Cannon or something. And since Glass Cannon is the best thing ever, Lone Wolf is the worst thing ever.
That's not entirely true. Lone Wolf grants additional Ability Points, which allow a single character to stack excellent offense and defense, and allow talent and spell combos that are completely impossible across a single character without book exploiting. It also much easier to keep the inventory of two characters clean than four characters, and if you are going to only play with two characters anyway because it is dramatically less hassle, you might as well take Lone Wolf.
But generally, I do agree that Lone Wolf is a difficulty INCREASE.
