Soo, Wraithform for a Fighter/Mage? [which mobs have magic weapons?]

Theoretically, this should be useful through much BG1, but almost useless for BG2, maybe?

Which mobs can hit you through it?

Wraithspider?
Vampire Wolf?
Ettercap?
Umber Hulk?
Troll?
Spectral Troll?
Flesh Golem?
Wyvern?