I was able to get a Business class ticket finally
I will now start looking for information about AA/EY lounges in ORD/AUH/HYD.
Routing is: SFO-ORD-AUH-HYD & HYD-AUH-JFK-SFO
Last leg:JFK-SFO is available only next day(3rd May). I will buy a regular ticket for this sector but all others I am confirmed.
Thanks to all who shared their advice & expertise.