It will be ACM travel from Riyadh to your home base if your home is on the Saudi / RIA network. If not then it will be ACM travel to her closest city to your home and then it’s up to you. ID 90 or ZED or full fare.
ACM travel is when you travel on the GD and jump onto the airplane in uniform.
Buisness class not always guaranteed. And the process of getting the ACM authorized is a nightmare of sorts. Which in essence becomes a deal breaker for me.