At Tfly belts are on at 10000 at the latest, this gives the crew enough time to prepare the cabin and a cabin secure message is passed via the TV screens. No other announcements are made. Granted this can occasionally mean that crew are sat for small periods during holding. Although on a run of the mill approach cabin secure is usually received between 2 and 4 mins before landing.
I reckon it works well, essentially all the flight crew has to do is flick on the belts and we get a secure 10 mins later. I can't personally see the benefit of the Ryanair way, making two seperate PA's at a fairly critical stage of flight. Im not Ryanair bashing, in fairness lots of airlines do it this way.
The problem that you have is that you want more time on our feet and get the pilots to tell you when to sit down. Your management will probably ask why, after several hours on your feet do you want another 3 minutes. From a flight crew point of view its nice to just let you get on with it and take responsibility for it.
Anyway good luck