(Just theorycrafting around, this is not meant to be a League Starter)
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Hellou!
I know it's way too early to start building around a new skill we don't know a lot about but I had to, it just looks so neat!
Like the title says, I tried to build around Exsanguinate (Link: http://www.vhpg.com/exsanguinate/) and chose Hierophant because I thought it had the best balance between damage and defense. Especially spell life leech seems nice because Exsanguinate uses life instead of mana. That way we can use all the mana for Mind of Matter and some smaller auras (War Banner and Herald of Purity).
One of the main items of the build would be Disintegrator to get Battlemage, more physical damage and a bunch of other stuff (in case we use more shaper/elder items).
Essence Worm is also a valuable addition to get the most out of the Pride aura without losing all our mana.
Although we are not spending any mana we will still be able to get Arcane Surge through Hierophant.
So... yeah! I tried to focus on physical damage and spell damage since both seem to scale with Exsanguinate hits and dots instead of focussing on damage over time only. We will see how the final numbers will look, I just left the main skill blank at the moment since I just wanted to build the tree a bit and tinker around some items.
Here's the PoB: https://pastebin.com/nK708nV5
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Do you have any suggestions on what I could change on the tree or maybe some items I forgot about? I'd be really glad to get some advice, normally I just copy builds I find on PoE Ninja or on the forums.
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Thanks for reading!