Limp Lash + Sneak Attack?

I have an Eldritch Scoundrel.. from what I see in the rules, it seems like I could use Sneak Attack to make Limp Lash quite a bit more effective (Druid cast Obscuring Mist & Ashen Path on me).

What do you folks think? Is this the way to rescue Limp Lash from being useless?