You'll most likely not have any huge success by sending Google Ad traffic directly to a landing page.
I've tried that numerous times in a couple of niches, and have done so on Bing as well, and it doesn't tend to work.
While I'm sure it's still profitable in some niches, personally I'm not able to get it to work in the long-run.
Besides, I don't Google allows you to link to an affiliate site in your Google Ads anyways. My 2 cents.