I am in the middle of a total renovation of my primary bathroom. Question on whether I can make this design idea work.

The room is 15' long by 6.5" wide. The ceiling slopes from 108" to 216"(18'). (toilet,shower and closet are in another adjacent room)

This question pertains to an idea I have for trying to gain hidden storage above the vanity and for increasing vanity light as well as a modern, architecturally detailed aesthetic solution for the room. The room had a long soffit with lights which I removed. I have had 6 recessed lights installed in the sloped ceiling. I feel I still want more immediate vanity lighting . I could use an LED mirror but I want to integrate a medicine cabinet(or two) into this wall. Storage space in the bathroom is limited except for the vanity itself.

The original bathroom had a recessed medicine cabinet at the far left end of vanity.

It is dated looking and could not be centered as there is electrical wiring for the bathroom lights. So I want to remove that entirely. The wall that the vanity will be installed(floating vanity) is 6" deep.

I prefer a long mirror solution although my back up is two large mirrors centered on the sinks.

This question is specific to the long mirror idea. I have an idea but cannot tell if it will be hard to make it look well designed and well detailed. The idea is basically to have a tall, narrow recessed medicine cabinet then a vertical LED light, then a long - 83"w x 40"h- mirror (not recessed but flush with the light, followed by another LED light 40"h x 2.75"w followed by a second recessed medicine cabinet 12"w x 40"h. I am currently planning to use a Robern PL series med cabinet, then their ganged Midline Vesper series light(40"H). The 83" wide x 40" mirror would be provided by a local mirror company same one doing my shower doors and other bathroom mirrors. That mirror is then followed by another Robern Midline series light and a Robern PL series recessed medicine cabinet. While concept wise I know this is good I cannot determine if the Robern joint between the light and the wall mirror is going to look rigged or if will look good/right. This plan does not require my GC to relocate any studs. Which is highly desirable at this point since it is a late point idea as vanity delivers next week. Don't worry about sink location . It is a double sink and they would be in front of the "mirror" portion of the wall.

Can anyone comment? Sorry if this is a bit complex hoping it makes sense to someone out there.

And yes I know Robern is costly. But after going through budgeting on various similar ideas the cost is coming out very similar and I know they have a well designed solution. It is the long mirror that I want and the unknown as to whether I can design a successful "joint" between the Robern light and the mirror that makes me anxious. After spending all that money I want it to look like a fabulous, functional, well lit vanity solution.