Best tokens build? 2 of 4 (Selesnya) (Standard)

Looking at what is the best possible tokens build for the upcoming standard. This deck is the Selesnya build.

Why play Selesnya?

1) March of the Multitudes.
This thing can pay off pretty big with a full board.
fantastic with Divine Visitation.
*only a one of, but probably your most powerful card.

2) Trostani, Discordant.
an additional anthem effect is great at the top of the curve.
adds 7 power to the board for 5cmc.
*lifelink helps combat aggro decks, although turn 5 can be a bit late sometimes.

3) Emmara, Soul of the Accord.
this versions additional way to make a token on the turn you play Divine Visitation.
an amazing convoke target.

4) Shanna, Sisay's Legacy.
this can be a very large creature for 2cmc in this deck.
the downside is that it can just be a little 1/1 sitting on the board, however nearly all our turn 3-5 creatures turns it into a buff creature upon arrival.

5) Saproling Migration.
at worst it gives you two bodies.
has good flexibility for the late game.

6) Flower // Flourish
the card that the most people would underrate in the deck.
great versatility.
allows us to cut the deck to 23 lands.
almost certainly can be played on turn 1.
*a late game bomb (at sorcery speed though)

7) The sideboard.
a) Assurance // Association: is a perfect protection card with a huge late game payoff.
b) Knight of Autumn: off theme, but a powerhouse in certain matchups.
c) Shapers' Sanctuary: can draw you a ton of cards against midrange/control decks.
d) Shalai, Voice of Plenty: turns on the pump ability

What are Selesnya's struggles?

a) Green does not help us with our removal issues.
*the deck loses access to Lava Coil and Shock.

b) We still have to play gates.

Overall:
Our early game is much improved over Boros. We will likely maximize all three early turns in this deck.
The midgame is slightly weaker as we lose access to Heroic Reinforcements and Siege-Gang Commander.
This deck does a much better job of protecting its creatures.
The sideboard feels vastly improved over Boros.
*The deck is far more versatile as the split cards in Selesnya actually fit perfectly with the decks theme and goals.