There are many types of attack strategy to smash ring bases. Experienced clash of clans player usually prefer bowler witch or miner attacks. Its not easy to tell here how to attack this bases. You need to watch war replays and choose the right army.
Dont forget to practice after replays. If you are in active clan, you should try your army with friendly challenges.
You can watch this video to see how to attack ring bases. Good luck.
