I'm not sure what your thoughts on sleeping in armour are but I've assumed that given the expectation of attack Magen would be sleeping in his armour.
Ok, that's just enough to make me not sure I want to do it next time. Didn't matter in the end, but I think I'll avoid it without great cause in the future.Hmm I think I would let you make a Constitution save maybe DC 12 or a bit higher or suffer a level of exhaustion. With Heavy Armor Mastery feat you would have no problems sleeping in armor.