sites to combine with smoke?

are there any sites with very little zoom that cna be used with smoke grenades I think it would be handy when storming certain rooms

The night vision / thermal scope actually lets you see through smoke when you use it. I'd suggest that if you're looking to make use of the smoke nades.

will that work well with a shotgun like the nova?

Yes. Also it lets you see the outline of cloaked players I believe.

The drawback is your field of view is limited to roughly 30-50 feet or so.

next problem is that they wont work on low settings at all.
the only thing thats working is that spotting is still surpressed

Yeah, i wish that the smoke grenades actually worked against players using low settings. for them its just a couple small black puffs, instead of a visually disabling situation.

Well, if they could just optimize it so you didn't need top of the line power to run it on med/high, this problem would solve itself.

As far as sights to use with smoke, IRNV is the best way to do that, for sure.