[Deck] U/R/b Workshop Slaver, Is It Viable?

[JuJu]

Well, I'd like to discuss my version of Slaver, I started with Toad's original Decklist(the one with the Blood Moons) and cut a few things to take ideas from Rozetta's Slaver that he posted a few months ago. I went on to add Black for tutors and another win condition and since than I've been having success with it but like always, a deck can be made better and I'm hoping this one can. Unfortunately, I'm short on time at the moment so I can't explain the strange card choices I have, feel free however to ask why they're there and I'll gladly answer when I have time. Oh, my sb needs alot of help, since I have no idea what so ever to put in it; my Meta is general but with alot of rogue scrubbiness like PT Funk and stuff like that.
Now to stop my blabbering, here it is:

U/R/b Workshop Slaver

2 Ancient Tomb
4 City of Brass
4 Volcanic Island
1 City of Traitors
1 Tolarian Academy
4 Mishra's Workshop

1 Mox Sapphire
1 Mox Emerald
1 Mox Jet
1 Mox Ruby
1 Mox Pearl
1 Mana Crypt
1 Mana Vault
1 Sol Ring
1 Black Lotus
3 Gilded Lotus

1 Pentavus
1 Platinum Angel
4 Goblin Welder

3 MindSlaver
4 Chalice of the Void
1 Memory Jar

2 Future Sight
4 Thirst for Knowledge
1 Ancestral Recall
1 TimeTwister
1 Tinker
1 Yawgmoth's Will
1 Wheel of Fortune
1 Demonic Tutor
1 WindFall
1 Time Walk
4 Force of Will

Sideboard:
4 Reb
4 Tormod's Crypt
3 Blood Moon
4 Stifle

Once again, the sideboard is very up in the air so I would like alot of help with that. Also, I'm not running C.Wishes for lack of space, I'd like to run them but I can't see anything that needs the cut at the moment.

[urzas child]

i just tested a bit with black, these are the changes i did from my original list:

-1 c wish
-1 fof
-4 shivan reef
+4 cob
+1 will
+1 tutor

it seems pretty good, i dont really like losing the second c wish (you dont even use one.... kinda interesting), but i cant think of anything else to cut

ill post back when i test more

[Jakedasnake]

From my experience with Slaver, I've noted that Yawgmoth's Will and Demonic Tutor just don't really have a place in Workshop Slaver. However, in Control Slaver, which has a different gameplan, the black splash is warranted.

I wouldn't play black in Workshop slaver because:

Yawgmoth's Will just isn't needed. Quite often you'll already have a Mindslaver lock by the time Yawgmoth's Will becomes playable. By that time, Yawgmoth's Will is just a win more card.

When playing with Workshops, a nice colored mana base usually involves no more than two colors. Often, you have to play 1-2 more mana sources than you'd like to to make it work, or you have to cut basic lands, etc, which are definitely strong in the current metagame.

Two colors, in my experience, just works a lot smoother when playing Workshop Slaver.