Grimrock

To change the xp gained for killing a monster is simply:
But there is apparently no such function for setting xp gain if you're dealing with a monstergroup instead. Does anyone know of a workaraound? Is there someway of addressing each monster in a group seperately?

Don't you gain exp after killing each individual monster in the group? So the group itself doesn't have a set amount of exp, but the individual monsters do? So you just have to change the exp of the monsters in the group?

Monster groups just spawn individual monsters. The monster group object doesn't really exist at runtime. You have to change the individual monsters.