KellK - I've intended, against time constraints, to write a Substitute Powers reference thread ... someday.
The Ardent's stuff on the Mind's Eye update goes:
4 Mantles - specifically available to non-Ardents
Sub. Powers - specifically referring to the Mantle, not just the Ardent.
Then the Divine Mind
needs to be able to use BOTH of the above, not just to become vaguely useful (Not)
but also to get rid of some dead levels with no powers available. And obviously the Div Mind can't really use 6th+ level powers.
Heck it might not even make it to 20th level ...
Also, the Psion (which-ever) that gets the Life Mantle as an ACF at level 5, specifically gets the Powers listed.
They could have used the standard phraseology of getting the Mantle, instead they aim toward to powers (!!).
It's not like any Psion really needs to boost, but being specifically restricted to the 8 powers listed, and then Sub in 2 more via Sub Powers.
So, with all that, not very well strung together, a PsyWar could Sub Powers. And should just to get rid of the 7s to 9s it can't really use.
(and I need to edit this massively to have it be reference material
)