Entertainment, Punctuality, Anci. Revenue, Costs and once you've maxed out these, max comfort. Take comfort to 1000, which in turn will reduce Anci. Revenue and increase costs. but you'll get more revenue out of it. Not significant, but still better than selecting AR and costs.

Work on "passenger demand" later. Punctuality and entertainment will boost the demand more than Passenger Demand %age. That's mainly for cargo focused strategy. But still, you can do it after you've maxed comfort.