1: Blind has worked for me for him to always miss, when I did it anyway
2: Always have at least 1 hp left b'cause demi won't do any damage if you only have 1, the attack does like one-third of your health or something, so what's one-third of 1? .01? (on the game, not in actual mathematics)
3:I don't know what in the heck you'er talking about with that one
4: From what I've heard, yes, but why heal him? (I think demi heals him)