what type of damage works on sand wurms?

Fire and ice do pituful damage.

Air probably. Either that or your spells/attributes are crap.

Attacks that ignore armour

we had a balanced team that had no problem, (2 els, rangers, mes, wars, monk). it went down suprisingly quick.

if you are a warrior, try and use Sever Artery, to make the wurm bleed all over the place, and Gash, for the finishing blow...

i use this combo on everything... except on most of the undead...

but, im a W/Mo, so on undead, i use Bane Signet, and another smiting thing that i forgot the name of... wtf... i have a really bad memory for that one particular skill...

Sand Wurm's not that hard, I did it with a group of level 17 NPCs. The key is to make sure only the tanks are within melee range, because Alesia more than enough compensates for the damage it deals to the high armor tanks. Just keep hitting it, your damage out put is slightly bigger than its self regen, so after maybe 5 minutes it should die.