Can someone please check this sentence. I want to make sure I DON'T need a comma in the sentence. THANKS!

I have found her to be extremely competent in areas by exemplifying her creativeness through many challenges she has taken upon herself.

I have found her to be extremely competent in __________ areas by exemplifying her creativeness through many challenges she has taken upon herself.

The phrasing is strange to me. Something is missing. What kinds of areas? The sentence also seems unusually vague. Are you following it with specifics so the reader knows exactly what you mean?

No comma is needed so far.

In order to determine if a comma is needed in the sentence, we can break it down into its different parts.

The sentence in question is: "I have found her to be extremely competent in areas by exemplifying her creativeness through many challenges she has taken upon herself."

To check if a comma is needed, let's identify the different components:
1. "I have found her to be extremely competent in areas" is the main clause of the sentence.
2. "by exemplifying her creativeness through many challenges" serves as an adverbial phrase or a way to explain or provide more information about the main clause.
3. "she has taken upon herself" is a relative clause that provides additional detail about the challenges.

In this case, since the adverbial phrase "by exemplifying her creativeness through many challenges" is placed in the middle of the sentence, it is appropriate to use commas to set it off. Therefore, a comma should be added after "areas" and before "by," like this:

"I have found her to be extremely competent in areas, by exemplifying her creativeness through many challenges she has taken upon herself."

Using a comma in this position helps to clarify the sentence's structure and make it easier to read and understand.