[theaetatus]

Wurmslayer just isn't good dps in Main hand. With the damage bonus of 11 at 60 (if I recall correctly), it works out to a 36/40 weapon. Compare this to a Lamentation for example, which becomes a 20/19 weapon.

You will get some big hits with dual wurmslayers, but you'll do more damage with a faster weapon in the main hand.