---->THE JOKE--->
Your Head.
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First of all, Bellona's visual design is 10/10. She's EXACTLY how a warrior goddess should look, strong, fierce, and inspiring terror.
Second, the fact that you rate Cu Chulainn 6/10 in importance shows your knowledge. That is, the lack of it.
To the Irish, Cu Chulainn is a symbol of their independence and he's revered there.
Longer version read this post by CircularMotion:
https://www.reddit.com/r/Smite/comme...lainn/dixll29/
Basically, to the people that actually matter, Cu Chu is 10/10.
Also this goes without saying, but Mythological Importance should only count for the people of that mythology/culture/religion.
Thus, Bellona would be 9/10 for the Romans.
Raijin, maybe 7/10 for the Japanese.