I’d also add that you’ll never get a “.ws” domain to rank well in Google.com as it has a “local” version for that ccTLD (Google.ws). If you do a search for “casinos” on G.com and G.ws you’ll see that any .ws domains rank in the latter, but not in the former, so you’re market is limited pretty much to Western Samoa.
You may be better off aiming for keywords in extensions where Google doesn’t localise, though in our market I’m not yet sure if this works. I’m trying it with “gambling.io” at the moment to see if its possible to rank.