As somebody else has quite rightly pointed out, it would be wise just to the simply find the best price, in whichever class you wish to travel, between a and b and do not get tied in with any of Etihads so called deals.

If you get a code that gives you 30% off a fare that you would have bought anyway then that is fine! but my experience is a 30% off anything with Etihad means it's at least 30% more expensive than you could buy elsewhere.

My advice would be not to chase status with this airline it's simply not worth it and their customer service operatives are robots designed to give you incorrect advice and/or pointless and irrelevant information.
Shame as the product is quite good.