autoattack for warlock

Hey guys.
As far as warlock have pretty enough insta casts, i think i can use it. And with /startattack it is working pretty fine, but dmg from wep is pretty low, same as we need to get out from melee pretty often.
Is there any way to use wand same way as autoattack work? I tried /castsequence and /cast shoot, and they are working as start/ stop function, but not forces to 1 insta hit like /startattack does.
Basic idea like i used corruption - insta cast reseted swing timer - hit pulled during spells on gcd.
Mb there is any way to do it through macro ? Or wand works not same way as autoattack?
thx for help

This should not work in any way whatsoever. If it does, it is a bug and should be fixed.

But, it works, so question still up.