Viper would of been better if it had a different name

[Iscah]

Its certainly not what I expected for a new job name but if people can distinguish warriors(lowercase as in the many combatant's referred to as this in-game) from Warriors(the specific berserking inner beast job), I don't see how Viper could be problematic for a name.

Not to argue against the overall meaning of your post, but the axe-wielding berserkers are still "lower-case" warriors. The game text doesn't capitalise job titles.

If anything, it's actually the other way around with the job "warrior" versus the title "Warrior of Light".