Looking for opinions on Rogue weapon selections please.

[Netherzul]

I currently have Ragebringer, Thornstinger and have recently acquired a RSSS.

I know the Thornstinger has a slightly higher ratio than the RB/RSSS, however, it's limit to mainhand annoys me.

I've been running with RB MH / RSSS OH for a day and wanted to know by omitting my Thornstinger, am I losing DPS? If so, is it minimal? Or should my dps roughly stay the same? Thanks in advance!