google sheets – combining if and or

I am having difficulties creating this formula in google sheets. I have columns D,E,F with the headers:
Should Actual Diff.
Under D and E a drop down with Top Expert,Professional,Working Knowledge,Awareness of

I want the following conditions:

If “Top Expert” and “Top Expert” then “No Need”

If “Top Expert” and “Professional” then “Slight Need”

If “Top Expert” and “Working Knowledge” then “Need”

If “Top Expert” and “Awareness of” then “Strong Need”

If “Professional” and “Top Expert” then “No Need”

If “Professional” and “Professional then “No Need”

If “Professional” and “Working Knowledge” then “Slight Need”

If “Professional” and “Awareness of” then “Need”

If “Working Knowledge” and “Top Expert” then “No Need”

If “Working Knowledge” and “Professional then “No Need”

If “Working Knowledge” and “Working Knowledge” then “No Need”

If “Working Knowledge” and “Awareness of” then “Slight Need”

If “Awareness of” and “Top Expert” then “No Need”

If “Awareness of” and “Professional then “No Need”

If “Awareness of” and “Working Knowledge” then “No Need”

If “Awareness of” and “Awareness of” then “No Need”

I was able to create ONE formula for just one but then it stopped working

https://docs.google.com/spreadsheets/d/1Gtykc0ipLIjIB1YziwmGUAwQC7XqfeZ71-6Sfgw91f8/edit?usp=sharing