Unfair comparison. You're directly stating you'd do the comparison for 1 class with a perk that alters the time against another class without a perk that could adjust the time. Your view of a "realistic pvp setting" is likely different than mine. A well timed BD can be as effective as a well timed SB (or stormcaller for that matter). The only reality that matters is the server statistics. If they show sunbreakers are outclassing all others by a strong margin, then you could argue it's overpowered.