When you max out possession - Dishonored 2

Every ghost build needs possession.
In this video, I maxed out the possession tree and all Bone charms related to possession.
My power upgrades tier list for a stealth, non-lethal playthrough is:
1. Maxed Dark Vision
2. Maxed Possession (chain host only if you have "Seperation Trauma" Bone charm)
3. Agility
4. Bone charm crafting (Combine 4 same traits)
5. Stop Time (expensive & not as useful as possession, but there are uses)
Blink upgrades are not necessary
For an optimal stealth playthrough, I recommend picking Corvo, and quickly maxing out Dark Vision and Possession.