Core: Light Pick

The light pick is a 1d4 damage, 20 crit, ×4 multiplier light martial weapon. Weighs 3 lbs, costs 4 gp. 4d4 averages only 10 damage, but if you have, say, 14 Strength that’s 4d4+8 for 18, plus your Sneak Attack damage whatever it is, for a pretty nasty Fort save. Not much is surviving that regularly. And that’s ignoring Craven, which you really should have; that would give you 4× your character level on top of that.

The dragonsplit is much better for a general-purpose weapon, though rogues rarely have the feat to spare. I like the light pick as just something to have available just for coup de grace. I would probably not even bother putting magic on it until pretty high level (a +1 collision light pick would be choice there, +24 coup de grace damage for a +3-equivalent), and wouldn’t use it as my primary weapon on most rogues since they don’t have proficiency with it and it’s not worth getting proficiency with it.