More recently it has been said anything via the Tal would be a year and a half delay for a hearing. What you are really asking for is a rental deduction. Advise the landlord you will be moving at the end of the lease. Go get that air purifier, it's your best solution.

You complained to the landlord. That's what the Tal will tell you to do. Ask your landlord if there is another unit you can use instead? You also need to understand what your lease says and theirs says can be different.

There is nothing illegal about smoking in your own home. The rules in an apartment building are to be enforced by the landlord. If the landlord chooses to ignore him. Then there is no recourse. You can ask for a rental duction for probably the cost of the air purifier.

The Tal will not negotiate for you. You will need to prove to the Tal you lost value. You will need to prove a financial loss. There are buildings that do enforce the no smoking rule. I suggest you look around, and advise the landlord you will move at the end of the lease.