Can a nighthawk R8000P be use in a meshweb and if so what other devices

[IndioTaino]

I will like to combine my AC4000 wifi Router with a mesh device

[plemans]

As a full mesh network like orbi? no

can you add a mesh extender to it? Sure. The line of mesh extenders work great. Especially the triband versions. I've used the EX8000 with an RAX200 router and it was the equal to better than my Orbi Rbk53 system. 

I usually recommend if you're needing more than 1 mesh extender to move to an actual mesh system like the triband orbi's (not a fan of the dual band).