How can I improve this sentence?

Place a comma after wisely, showing that you have the ability to use various sentence types.

The whole sentence is ' Power can be used in an unjust manner, which is shown in the behaviour of Macbeth as the play progresses, however, it could also be used wisely, also shown in King Duncan before he is mercilessly murdered by Macbeth.
I feel like there's too much commas?