While that may be the case, in theory, virtually no one drops a Range to run double Caster. In fact, scanning through every speedkill for each fight, I've seen maybe one or two without a Range. Simply put, it doesn't happen even at the hyper competitive level. Now I do agree, the Range DPS should be doing more damage overall. However, saying you'll be replaced just isn't happening.

As for how much they're buffed. You will never see Machinist pull Samurai numbers because of its free mobility. If it did, it renders Samurai pointless. Melee require specific strats catered to their uptime, cannot do certain mechanics for the same reason and are largely the least flexible role. Thus, they can never "dismiss" mobility outright. Even a flat 500 rDPS boast would go a long way, though, personally, I think the entire Range role should go the support route instead of trying to pigeonhole Machinist against Samurai and Black Mage. But that's just me.