A long time ago I read a post where someone crunched the numbers and showed that a LIT II paired with an epic Cutthroat's Smallblade was slightly better then 2 Lit IIs.
I can't find that post any more but I wonder if the Epic Cutthroat's Smallblade is the best off hand weapon for a pierce spec rogue.
Star of day with epic Cutthroat's Smallblade vs 2 Star of days
Epic envonomed blade and Epic Cutthroat's Smallblade vs 2 epic envonomed blades
Epic garos malice and epic Cutthroat's Smallblade vs 2 epic garos malice
etc etc
thoughts?