Hello!
Your deck looks very funny and consistent! But in my opinion you have some cards that are powerful but not in this deck.
-
Collected Company: you are playing only 20 creatures, "a lot" of other spells and one of your main swinger is a CC4. We know how value is CoCo, but for two slots doesn't look good for me, maybe that space could be used for a Brimaz (he works really good with Tamiyo) or for
Dromoka's Command (it makes good synergy with Tamiyo too).
About Side:
- You think to include Elspeth against Jund or Tron? It makes your beaters betters and can give you a little army.
-
Spellskite for me is necessary if your strategy is attack with just one creature.
-
Dromoka's Command is also necessary against Mass Removal like
Anger of the Gods.
- Playing
Bant you have access to a very specific and strong hate like
Rest in Peace,
Stony Silence, etc. I prefer non-specific cards on my side, but it's just my opinion.
I have some decks of this archetype if you are interested to look another kind of strategies.
I hope I helped you.
Hands