[RonD]

If you're facing a lone SC (or an SC without too much backup army), there's always the old classic dom2 Golem:

2x Sword of swiftness
Starshine cap
Jade armor
Boots of flying
2x Stone bird

Two of these guys teleporting onto an SC foolishly left out in the open field somewhere can wreck your opponent's day.

Not as good as in dom2 of course, with no astral weapon, but they still work often enough to keep them in mind.

And my favorite (though obviously something you can't plan on every game):

Sickle Whose Crop is Pain
Shield of Gleaming Gold
Skullcap
Jade Armor
Flying boots
Whatever you want in misc slots

This guy turns all you barbarian attack events into 20-30 death gem events. He turns your neighbor's militia / zealot events into death gems (either with or without splitting the haul, depending on your relations).

He also often gets in the HoF. In one MP game "Super-Golem" had ~220 HP thanks to heroic toughness.