I’ve noticed many – if not all – sigils don’t seem to work if placed on your off-hand weapon (at least for the elementalist). Bloodlust, luck etc doesn’t stack – on weapon swap doesn’t work, etc.
Also, “Windborne Dagger” the elementalist major trait which should give 15% extra movement speed while wielding a dagger doesn’t seem to do anything.
Boottspurr from World of Enders [WoE]