hi SealedInSong, glad to see your interest. Based on post #33, the TWF version comes out ahead slightly; SWF is attractive though contingent upon how much doublestrike a player has (through gear and epic past lives etc.). However based
upon this thread on CON drain, I suggest combining the two debuffers via the SWF version (12 Wiz pale master, 5 bard/3 barbarian) in Wraith form wielding the easily acquired
Sacrificial dagger with CON: Virulent poison. You will drain neg levels AND constitution while using good defenses like incorporeality, temp hit point bursts and self-cast displacement (Swashbuckling forces you in Light or no armor, though).