[Damage rolls: Axe damage, orcish fury bonus, Improved divine smite, and an added 4th level smite.]
Slashing 2d12+4 : 7, 10 + 4, total 21
Radiant 6d8 : 4, 2, 5, 2, 5, 8, total 26
Orcish Fury
Increase your Strength or Constitution score by 1, to a maximum of 20.
When you hit with an attack using a simple or martial weapon, you can roll one of the weapon’s damage dice an additional time and add it as extra damage of the weapon’s damage type. Once you use this ability, you can’t use it again until you finish a short or long rest.
Immediately after you use your Relentless Endurance trait, you can use your reaction to make one weapon attack.
Also to consider:
Great Weapon Fighting
You can reroll a 1 or 2 on damage dice with melee weapons wielded with two hands.