^
I'd really cut black. Why?
If you are splashing Black for:
Confidant - We have Ninjas, Brainstorms, Ponders (Also, I use Sage of Epityrs) and to some proxy extent, Ancestral Recall
Extripate - Why? Ichorid? We have Jotun Grunt and Swords. Welder? Kill Welder.
Discard Effects - We have: Force of Will, Daze, Wastelands and Stripmine. Plus, Null Rod and Swords to Plowshares. We have enough answers.
Storm - Stifle. Meddling Mage naming Yawgmoth's Will. Postboard, Jitte Lifegain will make them miserable.
The Javelineer in my deck was cut to be replaced by Stormscape Apprentice so I would not have to Swords a Fattie.

Killing Welder/Confidant will be dealt with using Swords to Plowshares. (And Spellsnare in case of Confidants.)
Please do not use Vanilla ones. I personally believe they are really outdated. Savannah Lions and Isamaru, were good, but they don't have anything to help you. 2 damage clocks aren't worth to be called clocks, IMO.
About Tanglewire:
Tanglewire must be prevented. It's the single dominant card in staxx that ensures you don't play anything.
Wire + Spheres = you can't FoW easily.
Early Wire = Staxx having more permanents than you. Smokestack WILL own you.
Multiple Wires + other lock effects = Staxx really will pwn you.
I said single dominant card because Trinisphere is restricted. But for me, those 2 cards are the main threat of Staxx, followed by Goblin Welder and to some extent, Memory Jar..
Prevent those cards, and you have a very good matchup against Staxx.
Null Rod will stop Moxen, Triskellion, Karn, to some extent, Metalworker.
PS:
I'm experimenting a build that has maindeck True Believer, since I don't use Ancestrall Recall. Prevents Mindslaver in slaving me, prevents storm from killing me, prevents Duress + Hymn from stripping my hand, prevents Grindstone from grinding my library. ^^
Basically, it protects you from most top tier decks, aside fro Bomberman, which we have Null Rods and Stifle (on Trinket Mages, ofcourse.).