Changes I would make:
Loyal Cathar ->
Imposing Sovereign
The WW cost is a bit prohibitive for what it is. Sovereign seems like it has more play to it.
Aven Mindcensor ->
Vryn Wingmare
Both fit into the mould of 'disruptive 2/1 flyer'. I feel as if the Wingmare's ability will be relevant more than the mindcensor blanking an opponents fetch.
Porphery Nodes/
Griffin Guide ->
Angelic Destiny
I don't know how well Porphery Nodes plays in cube. Have played it in modern and it was pretty sweet, I just think people would be prioritising actual removal and wraths over it. Added Griffin Guide as another option to cut, just because the two cards are a bit similar and I really wouldn't want to draft two of these effects. You could even cut the other one of these for your chosen Ajani as well...
The rest take a little more thinking.
How many sweepers do you want red to have? I wouldn't probably cut
Mark of Mutiny myself, as Harness By Force seems enough. Having
Pyroclasm,
Anger of the Gods,
Bonfire of the Damned,
Blasphemous Act and another sweeper does seem a lot, so maybe cut one of these?
Mystic Confluence I don't really know. I never know what cards to cut in blue. Since you are/were already contemplating cutting
Spell Pierce for
Force of Will why not just try Confluence in its place?