Hard to build a good reanimator deck in this meta, as reanimate costs at least 5 mana, and there is a dearth of *really juicy targets* and when you do hit an Ulamog or a Kozilek, you miss the cast trigger.
I would focus on three objectives to fuel the reanimate:
Fill opponent's graveyard (i.e. removal)
Fill my graveyard
Juicy Targets
BG shell
RemovalFatal Pushx 2
Grasp of Darknessx 1
Murder x 2
Trial of Ambitionx 1
Never // Returnx 2
Battle at the Bridgex 2
Languish x 2
Ob Nixilis Reignitedx 1
Graveyard FillGather the Packx 3
Grapple with the Pastx 2
Call the Bloodlinex 3
Juicy TargetsUlamog, the Ceaseless Hungerx 1
Kozilek, the Great Distortionx 1
Metalwork Colossusx 1
Gisela, the Broken Bladex 1
Bruna, the Fading Lightx 1
Omnath, Locus of Ragex 1
Erebos's Titanx 1 (Works well with kill/reanmimate)
ReanimateEver Afterx 2
Necromantic Summonsx 3
Rise from the Gravex 1
Liliana, Death's Majestyx 1
Lands(25)
2 x
Geier Reach Sanitarium2 x
Hissing Quagmire2 x
Woodland Cemetery3 x
Forest4 x
Evolving Wilds(Good for Omnath)
14 x
SwampObviously you can't hard cast Gisela, Bruna or Omnath, but you're not planning to, and these are arguably some of the best reanimate targets. Ever After into Brisela is nice.
Looking at your build, I don't think you have enough targeted removal, and are relying too much on sweepers. They won't take out the big and juicy targets that your opponent might put out for you to reanimate. Battle at the Bridge is a great card as the life gain can be significant and it can also take out all the Gods, and even Ulamog if you have enough mana.
I might build the above, not sure that it will be very competitive, but might go well against ramp.