Your life is my life. Support/Mid

Banc isn't a must on Anubis, but building Soul Gem on Anubis isn't ideal, as well as not upgrading Shroud to Sacrificial.

Not to mention only 10% pen, always going Blink over Aegis, and no mention of situational defense in Mid.

Typhon's is definitely core on Anubis though. and you want 20%+ pen.

Straight wouldn't recommend Support role. While he does have some CC in his stun (skill shot) and the slow in his Grasping Hands, he's just not set up to be in this role. Your better option, if you want to offer a secondary role to mid would probably be Jungle, though that's still situational / off-meta. At the very least, you should put Mid as the first presented role. So I won't comment on the Supp build.

Before I go into the Mid build, I do want to comment...DeadShadow, you seem to do this with all of your builds. Why oh why do you not put items in your suggested purchase order? Either it's in correct order but your notes are incorrect, or your notes are correct and your items as shown are not. I just don't get the reasoning behind this. Really suggest putting them in suggested purchase order visually, as many won't consult notes and it's just sloppy (no offense).

With regard to the Mid build:

• Lifesteal: I think better care needs to be given to the consideration of his lifesteal potential combined with his passive Sorrow. Sorrow allows, given full stacks, up to 100% additional lifesteal. Not sure if build creator knows the magical lifesteal cap of 65%. In order to not potentially overcap, you'd then be looking at a total lifesteal value from items at half that...in the 30-35% range. Right now, if we consider that you get Vamp shroud at the start and go by the purchase order in your notes, it would be Vamp, Typhon's, Pendant, Magus, Soul Gem as first 5 items. In that, you're getting 44%. It drops down to 39% if/when you sell Vamp Shroud late-game, but it's still more than you need. As Boogie identified, I would drop Soul Gem and get a different item if you insist on going with this build in general.
  
  
• Bancroft's Talon: Boog, yes, this is a common item for Anubis, but it's not core. You can easily go with another lifesteal item in its place (e.g. in this example I'd consider Spear of the Magus a suitable replacement), and just still get Typhon's Fang to round out his lifesteal. Bancroft fits well due to Anubis' likelihood of taking damage when he engages, and with its ramping power and lifesteal stats synergizing with that. But Magus is a good alternative to provide its passive team damage bonus, and also fits for earlier use due to its flat pen.
  
  
• Penetration: This is lacking. This build provides 10% + 20 flat pen. Pretty low. Seems like an oversight. Where's Obsidian Shard or Charon's Coin, or Rod of Tahuti?
  
  
• The brief writeup from build creator for mid says "your power, lifesteal and cooldowns are very high," but I'd argue that the power level isn't exactly high. Your current build provides 565 power. It's not too bad, but could be a lot higher. In that, we could consider the currently popular "library" build, combining Book of Thoth + Book of the Dead combination. If I were to propose an alternate build (that deviates quite a bit from yours in that it doesn't have max CDR for example), it might look like Book of Thoth -> Spear of the Magus -> Typhon's Fang -> Book of the Dead -> Rod of Tahuti -> Soul Reaver or Chronos' Pendant or Pendulum of Ages (if you want some late-game CDR options). With Pendulum as your 6th, your total power (calculated from Smite Builder) is 894. Pretty huge difference compared to the proposed build, while providing higher base % pen, and still provides some survivability due to BotD's passive.

TL;DR, based on the above, don't know that I'd recommend this build. I feel it unnecessarily overcaps on lifesteal potential, lacks some pen, and overemphasizes the need for cooldown at the expense of other important stats.