If you want to keep your UFX III as clock master, then you can use word clock.
To use the UFX III as clock master has one advantage, then you can control the sample rate via the DAW/application.
And then the other connected devices would follow the sample rate (whether you use 44.1 or 48 kHz).
For the UAD preamp it could be an advantage to use the own internal clock for A/D conversion,
in this case the UFX III could learn the clock through ADAT and by design Steadyclock FS would guarantee a jitter free clock signal for the conversion of the UFX III.
If you want to record in double speed, then the two ADAT channels of the UFX III would be full.
You could consider using an 12Mic and to connect it via MADI, this would give you more headroom in terms of preamps and number of channels.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14