BUG Walkers (Please Halp)

[Agrus Kos, Enforcer of Truth]

Land Base: 24?
Figure out later, after we know what we are running.
We have 4 of all the temples and shocklands in thee colors.

Creatures:
1x {Aetherling}
4x {Sylvan Caryatid}
4x {Courser of Kruphix}

Spells:
3x {Ashiok, Nightmare Weaver}
2x {Vraska, the Unseen}
3x {Jace, Architect of Thought}
2x {Jace, Memory Adept}
17 Removal/Counterspells, thinking
4x {Dissolve}
4x {Hero's Downfall}
4x {Abrupt Decay}
2x {Far // Away}
1x {Dimir Charm}
2x {Extinguish All Hope}


Sideboard:
4x {Thoughtseize}
3x {Drown in Sorrow}
4x {Negate}/{Dispel}
4x {Golgari Charm}/{Ultimate Price}/{Unravel the Aether}/{Cyclonic Rift}?

Any help is appreciated. I am trying to help a friend out with this deck. Cost isn't too big of a deal, but I don't want to spend more than $50 or so (we already have all of the above, so those don't count).Would like to have more draw (considering {Urban Evolution} or {Underworld Connections}). The person who will be piloting this doesn't play too much blue, so I am trying to keep the reliance on counterspells to a minimum.

[Agrus Kos, Enforcer of Truth]

Also, one I get a decklist locked down, and do some testing, I want to experiment with splashing white for {Ajani, Mentor of Heroes} to get some card advantage. Shouldn't be too hard, because of {Sylvan Caryatid}, but we would likely need to play {Mana Confluence} or something which is kind of awkward in a slow deck like this because of how much the pinging hurts.

[Talock]

I am playing a very similar deck to this I will bump mine so if you want a look you can.

IMO card Drew is very important so  {Underworld Connections}  {Kiora, the Crashing Wave} and/or {Urban Evolution} are all good things for this type of deck.

Also with good card drew you can cut back on 4 ofs in the deck.