Insulation reveal window WDVS and clinker plus transition

Hello everyone,
I have the following wall construction
Ground floor brick 175mm stone wool 120mm air 15mm clinker 105mm.
Upper floor brick 175mm ETICS 135mm.

How is it best to insulate the window reveals? Can I also use XPS reveal boards on the upper floor with the ETICS even though the ETICS insulation consists of stone wool? Or do you have to stick to one material?

How is the best way to create a transition between ETICS and clinker insulation? Because for the clinker we want to use stone wool boards, also in the ETICS, but the boards used in the ETICS will be a different type than the simple clip-on boards behind the clinkers. Do you have any reference sites from the internet for me?

So we have received 16 cm of stone wool everywhere and always XPS (pink) glued on.

Thank you, do you have [WDVS] or clinker bricks?

Clinker - but the whole house.

So we had 16 cm of mineral wool everywhere and always XPS (pink) glued on.

Mineral wool? Are you sure?

Yup - Rockwool Kernrock. Unless of course Rockwool also manufactures glass wool, then maybe that too - the lower section was made with XPS (I believe up to ~ 40 cm?), then stone wool on top up to the top.