[Stavis_L]

He'd make a capable thug, but probably not a SC, especially vs. the AI which tends to build hordes of units. His protection is 18 + berserk bonus, which is high, but not high enough to mean that he's "invulnerable" (despite the unit description.) His main weaknesses are probably going to be:

1) With berserk + trample, he'll fatigue quickly, which greatly mitigates the value of his protection.
2) He'll only berserk once wounded, and without regeneration from other items or spells the wound is likely to add an affliction causing additional fatigue problems.
3) He's only size 4 and his shtick is trampling, so don't send him against cavalry.
4) He's not holy, so you can't cast bless him.
5) He's only middling MR at 11, so he'll be vulnerable to enemy spells.

If you can afford to invest a few gems toward some low-cost items, I'd give him a cheap Lychantropos' Amulet, that will give him auto-berserk + regen (albeit at risk of eventually becoming a mere skinshifter.) Something to give him some recuperation to offset the fatigue would go a long way to help too. With some minimal armor (fire/black iron plate, for instance) his protection is quite respectable, but his encumbrance increases too, of course; depending on your bless, a shroud could make sense too.