Do you mean the rune-covered trident?
The Silence of the Dead *is* insanely good, not to mention stylish, for a thief. I'd say it is best to switch. Weapon skills train very fast when you're fighting high-level monsters.
P.s.: you mentioned two-weapon combat. As stylish as that may be, SotD + shield is your best option. You get a much better DV and attack faster. If you fight at Agressive (F3) your shield skill will train very fast.
Last edited by grobblewobble; 12-10-2018 at 06:57 AM.
You steal a scroll labelled HITME. The orc hits you.