Mite Skirmisher - Siren Charm (Siren Beguiler)
If nether, max speed.
Boots with as many disables as possible(stun, frozen, snare, ect.)
Key thing is being able to go first, Attack the monster who is going after you, that will cause you to go after that monster however since there is a very high chance of the enemy being incapacitated it will lose its turn and the mite gets to go again. Continue to attack whatever monster is going next. The main counters I can think is the ones that inflict status effects on attack, so chastity, black hole halo, actually a lot of the on death abilities would still cause problems.
Is there any other creatures/artifact combo that can effectively 1 vs 6?