Are you tracking beyond VPiP? While he may raise often and play a lot of pots, a reraise could mean something entirely different and would have to be respected. Just takes a little extra patience and attention to figure out if he's playing LAG on purpose or is just an idiot. If he is LAG as a style then he wants nothing more than for you to think he's an idiot. Take your time. His stack will grow but soon he'll be on the rail when someone catches him red handed. Or he is going to have to shift gears.