She's really easy if you don't attempt to bumrush the Boss and use a proper strategy.
On hard diff as Paly, I won with swordsmen, guards, royal snake, inq, and shamans.
Royal snakes is really good vs her because of No Retal stat. Have snakes inq shaman(dont have shaman melee boss tho) on the boss and have the 2 footmen on adds control. Always make sure you can finish the adds (either by killing them or having them kill themselves when they attacked you). Never get overrun.
________
Harley-Davidson FXB