EK on the 380 is still the best option for a new hire imo. The problem is how do you secure a seat? They can change allocations on a whim to the 777.
EK morale is currently in the toilet and the company is a badly micro managed circus but the reality is that 380 FO is a very good gig.
QR for now might have opportunity and quicker upgrades etc but you still have to LIVE in Doha.
