It was not so hard. I killed it with Wendie, Kratin, Herasia and Broff. All alive after the battle. With many conditions though... I've played a lot harder battles in the Lax Saga.
In the games you face Uba, Charly, the vampire, Onyx, the mage woman, the crazy one which abducts Wendy in LF3. Also I think we didn't face the one who gave the house to Wendy. And something I remember and I think it's for another Wendy's master. Back there in LP1 you find a hidden tomb. I don't remember quite well but I think that there were written the names of Wendala and some guy.