I think..KOTM should be a way to use all the skills/spells you have at your disposal, and think out whatever tactics to defeat the other party, something like what LH does to outthink fighters.
That said, for my four matches in KOTM, I used different tactics for each person, because I tried to guess what the other person would use and hence counter. All my tactics had available counter tactics (for the people I used it on, except save for LH), so I don't see anything wrong with it.
PS, if heal potions were allowed in KOTM, I would definitely have dropped the DJ voids on the floor and quaff them when wounded, just to lighten the load in my inventory.