I am not defeated epic battle
Because i am not have dyna that much power
Show us your dyna and we will see. I was able to defeat Cold Heir with BT30 dyna, with lvl 8 Orderbound Bow and lvl 10 Spirit Healing insignia.
But on second account i have used lvl 10 Wicked Armor and lvl 10 Unholy Pact insignia and it worked for all lvls also.
I have a maxed out Dyna and can't get past level 4 either. My Skull Knight got me through the first 3.