Bull Centaur Taur’ruk
For every unit of Bull Centaur Renders, your army may include a mighty Bull Centaur Taur’ruk. He is a Loner, so he cannot be your General and can only join a unit of loners as well, so your Bull Centaur Renders. But he will greatly help turning that unit into a unstoppable piston to pummel your opponents to pulp.
The Taur’ruk shares all of the Renders’ excellent USRs which turn them into the great shock troops, and he even has an extra Impact Hit for D3+1 AP-2 S5 hits. Brutal! And for the cherry on top he gets inbuilt Armour Bane (1), which stacks with any Armour Bane his weapons might have. The Taur’ruk can equip a Darkforged Weapon and Shield, which is quite a good fit and still has 75pts to spare for magic items. This is a very capable fighter!