tr-j18 build idea opinion/help?

Thinking about modding my tr-j18. I dont see why this wouldn’t work, but wanted a second (or more ) opinion.

Replace the driver with 22mm MTN-MAX @6A with GuppyDrv (my favorite UI).

Run 6 of the stock XMLs as 3x 2s pairs in parallel.
Replace the center one with a XHP50 (5A or 2B tint??), and run it in parallel with the 2s pairs of XMLs.

If I am thinking correct this would give each emitter around 1.5A each. 6x XML @ ~550ea = 3300 + XHP50 @ 1200 (guessing) = 4500 lumens

So opinions/comments?

Thanks,
Jim