I just found out that if you are playing with a wizard and uses no mercenary, but uses a summoned ally and your familiar your exp points gained will be very lower. Thats not fair. With my monk I play by myself and get full exp points, but no wizard can live with some distraction ally to protect him, so I'll never be able to get my exp points same way I do with my monk char.
So I just use the monk mercenary with my wizard and no summoned allies like animals or familiars. Because for each of then you loose some exp points.
That exp penalties for allies is correct??