Nobody grades entire movies in AE. Let's get that out of the way first. If at all, you pre-grade your VFX shots, but only in a manner that the global grading applied later to the entire piece results in the same look, which is indeed doen a lot in Resolve and other tools. The rest entirely depends on the facility you are working with and what requirements they have which can mean anything from a custom LUT workflow to standard Rec. 709 or ACES film profiles. Either way, you can't fish blindly here and have to talk to people.