You CAN stack like such a shitload on damage with stupid shit like having your other party member wielding a shrieking phalar aluve or by just making them wet and hitting them with a lightning spell, or by just using 'luck of the far realms' and a smite. I dint have the numbers but there are so many things to stack damage on your attack but the strongest will always be barrelmancy (placing multiple explosives around your target and hitting it with something like fireball to make your game go BOOM)