I had this problem ... a smoker who would religiously sit on their patio and smoke so much that it would smoke us out of our house.

After speaking with them didn't help ... my next response was to religiously water the garden at the same time with my jet spray ...

I have amusing videos (from our CCTV) of our neighbour regularly diving for cover from an "accidental" spray of water.

"Sorry. I'm just watering our plants, sorry about that".

I wish I could say this solved it ... but the subtlety of the point that their smoking was impacting the enjoyment of our home, in the same way as my water spray was impacting his enjoyment of his garden was lost on them ...

We eventually settled it the old fashioned way. Not with pistols or swords ... but an old-fashioned chat after reporting them to the local council.

Luckily the problem is resolved ... but largely due to the threat of the Council taking action against their landlord.

The only solution is leverage ...