
This is in some ways worse than Earthly Serenity (1), since any high negative chaos token will bring your skill value down to 0 and you will succeed by 0 and lose 2 resources. With Earthly Serenity (1) you would instead fail and not loose any resources.
While test on Earthly Serenity (4) is very slightly easier and you have two charges more it does not really outweigh the more severe punishment and easier to encounter punishment, especially on higher difficulties.