User blog:Capblu1/Karna Masta fight advice if you guys don't mind

Just wondering if any of you guys wouldn't mind giving me some advic e. I'm struggling with the Karna Masta fight (no surprise there -_- ). I have two main squads, each with most of the same units but a different lead. Keep in mind that they are all max imp'd with enhancements too. Squad 1: OE Felice (lead), OE Selena, OE Krantz, OE Magress, OE Azurai. While the fight seems to go my way, shyt gets real once I cross that >50% threshold. Even with Magress' DEF buffs and Krantz's 2 turn mitigation, we still take a butt load of damage. Squad 2: 7* Grahdens(lead), OE Selena, OE Felice (bb management), OE Krantz, OE Magress. Thanks to Grah's light/dark mitigation buff, damage isn't as a big a deal but the constant bb drains make Felice somewhat useless. I also have Stein, Elza, Sirius, Avant and Tilith maked out in all aspects (imps, levels, evolution) I was thinking of getting either Zekt or Kulyuk from the unit of choice bonus to help make a difference. But I would love some opinions.