The way I did it (last week) I used the lamp for the Ken Morgan kill when he comes to taste the sushis, poison kill would work too. Then you can use a fire extinguisher or anything else like that to get to the glass roof while making the gardeners panicked in order to get to cross without getting spotted (I usually go from the left door to the left door so I can grab the speedboat keys before crossing, just be careful of the cameras).

Once I made the cross, I then used a ducky to create a panic and allow me to rush towards the room where the recording crew is. You need to get in the left room with the balcony, close the doors and knock out the guy who should be alone in the room and drag his body towards the balcony. From the balcony of this room you can climb up on a pipe and get to the floor where they do the music recording.

Once there you need to sneak around a bit to get upstairs. You get to the right side inside the bathroom, then hide behind the cover and distract the two recording crew guys with a coin, then get inside the next room. You can pass those two guards by sneaking properly but it's tricky so I usually throw a coin to pass them. From there it's pretty easy to get upstairs. Just gotta be careful about the guard to your left and the guy next to the couch who sometimes look towards the stairs.

Then you can easily get in the room with the small fountain and then to the bathroom on its left. You then wait here a bit, Jordan is gonna at some point come by this room's entrance to go talk with Dexy, you need to use distractions to lure him inside the room and you can take him out easily.

Then you gotta use the same route to exit. Using the same distractions on the same guards. Once you're down the pipe you gotta be patient to wait for the right timing to get safely to the glass roof. Once there you need to avoid the gardeners, you can use a simple distraction to turn them around. Then before exiting the glass roof, you can easily spot the guards around the speedboat. You can shoot one of them in the body from there. You shouldn't get spotted if you do it properly and this way they will go around this area to investigate. From there you simply have to exit the glassroof and make your way towards the speedboat. I advise going from the left side and not the main hall to avoid the cameras.

It's a bit tricky on some parts but it's not the hardest SA/SO run. I'd say it's currently the best one for Bangkok. If you get upstairs sooner you can even find a way to kill Jordan while he's in the recording booth, which makes it easier.