Using a widely accepted agility equivalence formula, full Shadowcraft is pretty comparable to the clown suit.
The formula (from http://www.ShadowPanther.net/) is: 1 Agility = 1 Stamina = 2 Strength = .1% Crit. = 5 Defense = .33% Dodge = .2% Parry = .13% To Hit = 2 Attack Power = 4 Any Resistance = 5 Health/5 Sec. = 50 Armor
Using this, the stats on the clown suit add up to 331, and full shadowcraft is 319 plus the chance on hit to restore 35 energy. Pretty close. Nightslayer is 452, plus its set bonuses.