

I did stealth dagger with maxed out illusion once, fun at first but nothing could actually see me to attack me so it got boring quick. Invisibility FTW! also, going through the dark brotherhood line using only illusion magic is hilarious (making the target attack guards so they functionally kill themselves)
I was using a spell from a common magic expansion mod, that will cast any 3 buff spells upon entering combat; i set Invisibility to one of them, so i could stab something (breaking invisibility), it’d die, id be noticed (triggering combat) and immediately be invisible again.