I'm assuming this is BO1?
I'm just going to throw some card suggestions out there to hopefully spark some testing/ I'm NOT suggesting all these go in the deck (but hopefully some will get ideas rolling). There are a few though that probably should make the 60.
Unbreakable Formation - actually I will say that this sort of card probably should make the cut considering you don't have a lot of interaction
Conclave Tribunal - speaking of interaction (I see you updated there but this is definitely one that should be in the list - possibly all 4)
Knight of Autumn - probably the last one I will say that should make the cut. Too much flexibility on the card and fits the theme and since you want to cut sage, this slots into the 3 drop.Oh and it's a Knight for
History of BenaliaVivien's Arkbow and
Vivien, Champion of the Wilds - both are really strong cards and will give some real game against control/removal therefore reasonable to consider.
Tithe Taker just a good in any selesnya deck and again since you have very little interaction, disrupting theirs isn't a bad idea.
Nissa, Who Shakes the World - seems a really good fit on most angles
Now because I mentioned Nissa, a little jank seems fun to suggest too -
Jiang Yanggu, Wildcrafter along with your mana dorks and things like Nissa could produce a lot of mana which could be fun to pump into
Finale of Glory or even
Finale of Devastation. Janky for sure but could be fun!
Tolsimir, Friend to Wolves - 6 power, 2 bodies and adds a removal option to the deck? Seems Interesting.
Biogenic Ooze - again a handful of bodies that add counters and gives you a mana sink for all those dorks.
God-Eternal Oketra - you're playing white with lots of mana and cards on your low end that don't help when you top deck them late game (so why not convert them into 4/4's?). The card is a brick wall that just keep coming back. And your playing white. Did I mention you're playing white?
Pledge of Unity does things at instant speed? It helps against the red aggro meta and the life gain potentially compensates for your lack of interaction? Stuff? Things?
Karn's Bastion supports the theme and possible to squeeze in
Blast Zone another way for you to cheat in some removal and surprise, you can proliferate!
Siegehorn Ceratops ummm....if you add a few counters to this, it could grow bigger...and ummm... be big.... okay now I'm reaching here....
Oh and I'm surprised about
Evolution Sage. I realize you're not playing cards that let you dump land onto the battlefield quickly and yes it's 2 toughness makes it trade down while being easy to remove but just a trigger (or two) seems like it did it's job (which seems reasonable)? Basically just play it T4 then land and it still has the chance to trigger again or interact with the board or drawing their removal which is just fine too. I dunno since I haven't played it in standard but it went right into my
Atraxa, Praetors' Voice commander deck.
Again these are all just ideas. Some should probably make the cut, others are worth testing and some are fun when you're not grinding.
Any who I hope this helps?
elk