Obviously your deck has some issues that need to be addressed, you asked for help, but really didn't listen to everyones comments. So let me reiterate some of them for you. The mind twist isn't needed, 3 duresses are a must though, secondly cunning wish is somewhat slow also. Seriously, I love u/g/b, I just don't think your build is acceptable, the accumulated knowledge just don't seem needed in your deck. I think you deck needs some more consideration.
Ok first of all, I listened to everybody's comments, and I took them all into consideration, and even changed my deck accordingly to some of them. That being said, I did take out the Mind Twist, It wasn't worth playing in the deck.
I think Cunning Wish is GREAT right now. with how much Slaver and Tog there is being played out in today's Meta, Cunning Wish is VERY necessary. Being able to Wish for that Smother, Oxidize or Naturalize could save my life and even turn the tides of a game. I'm not knocking you suggestion, I'm just disagreeing with you on that point.
Next, AK has been working quite well in the deck as of now, and most people are playing it in GAT right now, so I don't know why you say that its not necessary. If its not necessary, what do you suggest I put in instead?
As for the SB, I have some issues. Personally, I feel that Stifle should be run MD instead of Duress as it has proved much more effective cuz it's just broken. Yes, I would swamp your smother's for edicts most definitely. I don't really like Matrix in here since it screws with Tog so if u want that maybe put in some Ground Seals instead. Also, since you seem fully powered I would suggest running V. Tutor in the side. I'm also testing out a red splash right now and it's working pretty well for me so u might want to try that out because it opens some pretty good SB options such as R&R, Artifact Mutation, REB,... as well as Fire/Ice in the main.
Stifle being run MD is something to consider, but I won't do it until I see the metagame at a tourny. Depending on what I see, I may take Duressed out for them, but as of now I kind of doubt it.
I agree with you on Matrix, it kind of blows. I tried it out and it just a dead card, I took those out for Null Rods. Null Rod does stop the Moxen and Lotus, I am aware of that, but vs. Slaver, it wins you the game so its a good sacrafice IMO. As for the red splash, if I was to do that I think I'd just playing UBGR Tog instead. The manabase of this deck is about as unstable as it can afford to get, and adding red makes it worse. If its working for you, then great, but I think I'll just stick with UBG for now.