I wanna play this

Chaos Innoculation: 20% increased maximum energy shield. Provides immunity to chaos damage. Maximum life becomes 1.

Interesting mecanic so you became immune to chaos damage wich is working like poison and it damage life directly even if you have energy shield (I have seen a video of a Ranger firing Poison Arrow and the poison cloud damaging a skelleton mage with energy shield still full).
The other skill that uses chaos/poison is Viper Strike(see info on this site), works with swords, daggers, claw weapons, and is probably good to use on a caster wich relies on his energy shield to mitigate damage in PvP (dressed in cloth armor wich gives energy shield).
Perhaps your 20% energy shield is more than your life if you use cloth armor and it becomes a win/win situation, or your total ability to increase your shield with this 20% + other passive tree bonuses to max shield increase will outweight your life points.