Brannor makes an attack with his greatsword, presumably landing a hit on a
23 for
14 points of slashing damage. Additionally, Brannor uses his Divine Smite ability to expend one spell slot, adding 2d8 divine damage to his attack. This bonus damage deals
5 radiant damage but rolls a 2. Using the
Great Weapon Fighting ability reroll a 1 or a 2 on a damage die for an attack he makes make with a melee weapon that he is wielding with two hands, he rerolls the die. His
Divine Smite now deals
6 damage on that rerolled die of 2 for a new total of 9 radiant damage.
He likely misses his second attack with his greatsword on a
12 and does not use the
Bardic Inspiration die to improve it. He will still make attacks of opportunity against any opponent who provokes first. Brannor will move 5ft, then another 5ft, without leaving Cyanwrath's reach but forcing him to expose his back to the other members of the party, hoping that he will stay focused on the paladin instead. Assuming they are able to kill the other two mercenaries, he hopes to give them an opportunity to attack from behind.