Reporting and Analysis Migration Utility query

In my EPM env (11.1.2.1), I have two schemas:

(1) EPMSS : used for Foundation Service/Workspace/Shared Service (2) EPMRA : used for Reporting & Analysis framework/objects.

My requirement is to migrate from old 8.x Hyperion version to EPM 11.1.2.1 for the following objects :  (a) User Defined roles (b) Users (c) Groups (d) User Preferences (e) Repository Metadata (f) Repository files (g) Events (h) Authorization

However, I would like to know, which objects should be migrated to which schemas, as per the best practice ? Like, for example:

(1) EPMSS schema = (a) User Defined roles (b) Users (c) Groups
and
(2) EPMRA schema = (d) User Preferences (e) Repository Metadata (f) Repository files (g) Events (h) Authorization