I recently added 3x Thespian's Stage and took out 3x Swamp. Still have a few too many mana sources. Would like to turn another swamp into either a Liliana of the Veil or a Diabolic Edict. Just not sure which would be more appropriate. Pretty sure Liliana would be the best decision. Either way, first round of testing should be tomorrow with a friend. Might have to broaden my test group because he's still a newer player and not a perfect test pilot.
I don't like Night's Whisper in a deck without the full moxen suite, especially as you may be sinking a ritual to get the effect in this deck. Ritual, Thoughtseize, Bob seems much better in a lot of situations than replacing the Bob with a Night's Whisper.
I tried Cabal Therapy for a while and it was quite good but allot of the time I found that if I were running Surgical Extraction, Thoughtseize was better because of the ability to lead your opponent down certain paths, with therapy you are relegated to blind shots for the first one which is not where this deck wants to be. Therapy also has the chance of just not doing anything, much like Hymn to Tourach which is why I prefer Thoughtseize.
I was thinking more synergy between Bob + Therapy if life is getting low. I'm going to try and run without Bob to see how it is going once my final decklist is assembled. Then, proxy Bob and playtest with that. I'm still learning this deck as I'm going along (as with any "new" combo deck). This is such a far cry from U/B dragon.dec and mono-U trix which used to be my go to decks. Granted, that was when I last played and you could still stack damage...
EDIT: Thanks for the advice everyone. I did update this deck after a day of going to three card shops to get the last of the major parts. The only other thing I can think of adding is possibly a Maze of Ith, but still not sure about that one.
-Lands/Mana Sources- 28
10x Swamps
1x Strip Mine
1x Urborg, Tomb of Yawgmoth (still wish to get at least 1 more in here)
1x Cavern of Souls
4x Thespian Stage
4x Dark Depths
4x Dark Ritual
1x Mana Vault
1x Sol Ring
1x Lotus Petal
-Other Combo Enablers- 10
4x Vampire Hexmage
2x Helm of Obedience
4x Leyline of the Void
-Disruption- 12
4x Duress
3x Thoughtseize
4x Pithing Needle
1x Diabolic Edict
-Tutor/Good Stuff- 10
4x Expedition Map
1x Necropotence
1x Demonic Consultation
1x Vampiric Tutor
1x Demonic Tutor
1x Crucible of Worlds
1x Yawgmoth's Will (have yet to need to use it)
Played a few games against my friend's Angry Hermit and Suicide Black. Both were pretty consistent wins, but I still don't feel as though my list is 100% optimal. Still much better than the first revision. I'm really hoping that it'll at least top 4 in local tournaments. I also realize that I'm not a veteran pilot with this kind of deck as I'm noticing that I'm not making the most optimal plays when it comes to land drops.
The dropping of Wasteland was solely due to my normally naming "Wasteland" as Pithing Needle would come into play. And if there were some sort of land causing me problems or to stall his mana base, I'd try to tutor a Strip Mine. Also seriously considering dropping YawgWin as it has usually been a dead draw for me or a dead card in the opening hand. Might replace with a second Crucible of Worlds.