Dervish signet of midnight (heavy damage)

Hi im not really good in english so if i make errors i'm sorry.
I have the idea of a dervish who use signet of midnight with sand shards.
Each times i miss my attack i make incredible damage to all ennemy next to me. And an ennemy is blinded. The cost in enery is really low.
I' d like to you to test (Zaishen iway ;D) this build and tell me your ideas to improve and apply this on a farm.
Thank you very much to take a look on this.
Bye The concept is not really new. I haven't seen any guides or anything laid out for it, but I've heard of people trying it and stuff. I think it could be really good, except for the AoE scatter.

Sand shards doesn't do nearly enough damage to make this kind of build effective. You do much more damage through regular attacks. look at this.

Hi sorry it doesnt work with AOE. But with not a lot of ennemy (Aatxe ) with epidemic? I think the dervish can do enough damage against them. I tried that it works except they use both Riposte and Deadly Riposte those hit you for major dmg and with 3 of them hitting you with it you dont last long.

So yea, the Sig of Mid + Epimdemic + Sandshards = crap vs Aatxes

for some reason that combo still triggers the Rips