I'm considering dropping 1 Abzan Charm for 1 Ajani Steadfast

I'd suggest playing 3 or 4 of each card and not play 1 or 2 of some of them. You will get more consistency. Idk that's just what I got from looking at it.

You do get more consistency playing full playsets of cards, but you also get fewer options, with a bunch of pairs or triples you can play more different cards and so you are less likely to draw 2 copies of the same card (the second is redundant until you play the first). However some cards cough Siege Rhino cough are just so good that you want to draw them as much as possible.

I'm also pretty sure that Utter End has more use in the main than Silence the Believers , as the latter is only really better against those occasional heroic decks, while Utter End has the massive upside of hitting planeswalkers (and non-active gods).

Seeing as games usually go late with this deck, I can usually clear away 2-3 creatures with Silence the Believers . Utter End is SB for decks that are planeswalker/god heavy.