Braag
Member
Do note that he is much faster than you even while you are riding and he kills the summons super fast on his second phase and then rides you down.Is this the fight with the giant dude on a little horse? If so, you can ride around on your horse just summoning helpers over and over until he dies.
That tactic works but if he aggros you, he will catch you and most likely one shot you.
I beat him using scarlet rot and then dodged and avoided his attacks until he died of the rot. Took me 8 or so tries but if you are purely melee build then you're not gonna have a fun time.