dont put him on a range, just make a hand and value bet the hell out of it. figure the range is extremely wide, he calls w/ any pr, any gutshot, any straight/flush draw...sometimes hes gonna get lucky and catch a random 2pr or trips or whatever, but dont worry about that he'll be giving it back eventually. only time u should be worried about a player like this is when he is betting into you, and betting into you HARD. if he just keeps calling you, always assume you are ahead.