Mardu Midrange featuring Delve.

I have been slowly building mardu for modern. I believe the pieces have come together over the past few blocks to finally make it worth some brewing. I will admit the 2 drop spot hurts, but I am hopeful that it will be filled someday. So, what I have been thinking about lately is how the addition of new cards have changed the wedge, in particular painful truths. With painful truths, Bob may no longer be necessary, and with Bob no longer necessary we can have a higher curve. This brings me to the delve creatures: Gurmag Angler, and a card I never even knew existed until a few months ago: Tombstalker. Tombstalker rarely comes up in discussion because the decks running Angler (Grixis) can't be worried about hitting the double black, however mardu is already focusing on the double black for Liliana and Kalitas. Here is a brew I have come up with. Please give me your thoughts. Thanks.

Creatures

4x Tidehollow Sculler (Maybe YP?)

2x Brimaz

2x Kalitas

3x Gurmag Angler or Tombstalker or some 2/1 split

Planeswalkers

2x Liliana of the Veil

Spells

4x lightning bolt

3x Inquisition of Kozelik

2x Thoughtseize

4x Lingering Souls

3x Path to Exile

1x Terminate

3x Lightning Helix

2x Kolaghan's Command

2x Painful Truths

Lands

4x Marsh Flats

2x Bloodstained Mire

2x Arid Mesa

3x Blackcleave Cliffs

3x Shambling Vents

2x Sacred Foundry

2x Godless Shrine

2x Blood Crypt

1x Swamp

1x Plains

1x Mountain

We focus on B/W with a splash of red. I have considered Pia and Kiran, but Kalitas seems better. Also fulminator may be better than Brimaz, but with the Eye ban I think I may give the old Cat a whirl. If delve in Mardu proves to be a good idea, then perhaps we could even build around it a little more with cards like faithless looting, etc. Thanks for the input all!