Nighthawk AC2300 work with Orbis RBR10s?

Hello all and big thanks, in advance, for your insight.

We installed Orbi RBR10s (the white, square router, 2 satellites) a couple years ago.  They are connected to a router provided by an ISP. I have Nighthawk AC2300 (Model R7000P) just collecting dust now and it's discouraging.  

Is there any way to use my Nighthawk with the Orbis?  Would it just be redundant?  Everything is working fine, I don't want the Nighthawk to just 'go to waste'.  

I realize the Orbis are an older version but I've read conflicting articles etc about the ability to use the with the Nighthawk. Is it possible to use it as a switch or any other re-purpose?

Thanks again....