Most efficient form to summon Trolls in big numbers?

[cthulhu]

Vine ogres were the best early to mid-game summoned walls in dom2, but in dom3 I haven't had much luck with them.

For seriously large quantities of trolls in games that lack mass producible clams, massed troll kings might be worthwhile - IIRC they produce earth gem income that more than makes up for their gold upkeep.

Wights look okay to me if you don't mind the chill, not just as walls but as an actual main line unit of battle, but I haven't tried using them much.