Rogue off-hand weapon choice

[Arcan]

I recently managed to aquire a 13dmg piercer for mainhand, so I moved my rapier of oriin to offhand and benched my CSS. Im wondering is 12/24 delay ratio but with slightly worse stats going to work out better dps than the rapier which is 12/25 but slightly better stats.

Also, is there a better offhand I could get? Could sell CSS and Oriin and have about 2k cash to put towards something. Or at level 42 am I better trying to save (probably in vain) for my epic, or just questing it out?