This is a twist on the earlier Etihad sale from London to New Delhi via Abu Dhabi. By adding a 24 stop in Dublin you save over £100s! Travel is valid till end of June, so only book this fare if you are eligible to enter India, which means basically Indian passport holders and a few exceptions.
Fares book into Z class and you should earn 100% RDMs with American Airlines or 9962 miles. You would earn 125% with ANA or 12453 miles and 130% with Asiana or Alitalia for a total of 12951 miles.