Queen Remedi is one of the greatest boss.

Then why did you vote for Li-grim? Technically she is Remedi, but I'm counting the 2 as separate bosses.

Just train you're MP really high and learn MP>HP and make him a ninja, because of double sword and his good attacks don't require MP and the fact that he's fast, with that it would be easy, keep in mind to use a gadgiteere and if you have really good luck then he would sleep, doom, and poison every enemy, also, teach him Smile as a juggler to increase the amount of moves Marche as a ninja would do, the rest of the players on you're team are optional.(that is why it is not impossible)

That's how you beat her? I beat her by summoning Mateaus and then using Marche's normal attacks and Fighter Techs.