LineageRazor, it's implied if not outright stated in the storyline that everyone who participated in Ramuh's summoning was tempered by him. The only thing fairly unique about Ramuh is that he does not seek confrontation, he is merely a defender.

Anyhoo... I've recently discovered Game Theory, and their series on FF summons is interesting... Ramuh is talked about at the very end of this, the second vid in the series:
https://www.youtube.com/watch?v=7fbldmm-zX4

The FF concept of Ramuh is actually Indra, but they're kinda the same thing...