What chaotic weapon?

So, 5minutes ago, i levelled 81 dungeoneering, and i now have enough tokens for a chaotic wep, which 1 should i pick? Here are my stats.
Note : i'm wanting to train my att and str to 99 first

Rapier=slayer Cls=boss hunting Maul=pk

There was a few debates on TIF about which was better, and a test of 5k or so kills was done and CLS was deemed more efficient for general use.