Not a good idea.

>>BG Neo8

Check the response chart, doesn't look good on the top end. Neo8
would make a nice midrange driver and add a 'super tweeter' array.
Then you have to make a midbass array.

You might be better off selling those Neo8's and making a leaner and
better design, true ribbon + midwoofer, 2 way line array. Simple.

But since you have the neo8 drivers, just make a test baffle using cheap wood and see if those drivers setup yield satisfaction before
investing more money in the project.