Here is the common sense thought process for most units:
1. Do I have at least 3 CC-ed mages? If Yes, Go to 2.
2. Are all the mages in my current team stronger or equal to barb? (Gold and above) If Yes, Go to 3.
3. Is an awakened gold male unit with extended range worthless to me in the future? If Yes, you don't need him.
If any of the questions are "no", then use him.