It depends on what's most important to you with this deck:
Are you trying to get out a lot of token creatures, or only token squirrels?
I don't think you've got enough token generators (as I don't trust Druid's Call as a dependable way to get tokens), definitely find room for 2 more Squirre's Nest.
I would probably also cut the Druids Call in favor of Saproling Symbiosis, which will be much more reliable and can be played as a sneaky instant.
I usually don't like to post decklist but its easier for me to explain this way, here it goes...
creatures 16
4 BoP or Elf
4 phyrexian rager
3 squirrel mob
2 mindslicers
2 Braids (strongest card in the deck)
1 Fallen Angel
tokens 12
4 chatter of the squirrel
4 squirrel nest
4 Sap. Symbiosis
spells 8
2 Overrun
3 Diabolic Intent (amazing with the Mindslicer and the tokens)
4 innocent blood
Lands
4 Llanowar Wastes
2 Deserted Temple (to untap your Squirrel's Nest land)
2 City of Brass (or Darigaaz's Caldera)
10 Forests
6 Swamps
Reasons I made cuts where I did:
Cabal Patriarch: His Casting Cost is way too heavy black for him to be dependable, and his activation is expensive too. Braids will do the same thing you want him to do but better.
Rotting Giant: He's not be, but he takes a little away from the focus of the deck. You want him out early, and only 2 in the deck means you probably won't see him until late game, when he won't be that great. And I don't think the deck (yours or mine) can support 4
Consume Strength: I had a tough time cutting this out, but I think Diabolic Intent is a stronger card in here
Druid's Call: I don't trust it. Its a creature enchantment which is already tough to control, and you can't force your opponent to deal to the enchanted creature. I can't see this thing getting you tokens.
Additons:
1 Braids: She makes the deck tick, but you don't want to run too many
Fallen Angel: She is a flyer and a quick win condition once she becomes active
BoP: For mana acceleration (which you definitely need in here) and mana cleaning (which you also need)
Diabolic Intent: Its awesome in here. If you sac a Mindslicer his ability resolves before the The Intent does, so you end up with a card.
Overrun: Another win condition, if it resolves you probably win.
Saproling Symbiosis: A lot more tokens, more than you'll know what to do with.
2 Squirrel's Nest: Most reliable token generator in Standard outside of Nemata
Deserted Temple: Combo with Squirrel's Nest
Hope this helps
