For those who main/semi-main a DPS (e.g. DNC, RDM) but like Healers...

[ty_taurus]

I, personally, would just call...

• a "DPS" any job whose gameplay veers from or builds on the cross-role average/minimum primarily in its additional considerations and optimizations in pure DPS,
• a "Tank" whosoever builds atop that primarily through kit tooled for managing enemy behaviors and positioning to the effect of maximizing party output while minimizing party loss of HP or resource relevant to staying alive and which would come at cost to other outputs,
• a "Healer" any job that builds atop that primarily through kit tooled for keeping the party's members alive through means independent of manipulating the enemy's behavior and positioning

But here's the thing... What if a job is equal parts DPS and equal parts Healer--that its gameplay is perfectly balanced between its priority to optimize its DPS output and prioritize party sustain, and can do both competitively with other DPS and healer jobs at the same time, what do you call that? Moreover, what actually can be defined based on the descriptions you gave? Whether or not a job 'plays like a DPS' or 'plays like a healer' is ultimately a subjective statement. Sure we can use extreme examples like Red Mage that has no changes, but just happens to also have Vercure III which the job isn't built around but can satisfy healing requirements anyway, we could say that more clearly 'plays like a DPS,' but what about a non-extreme example like the above? If you ask 10 people what role they feel that job is, you may get 10 different answers--something that isn't definitive.

But you know what is definitive? If you ask them whether or not it dealt enough damage and whether or not it could restore enough HP you'll get 10 of the same answer, because either the job could or it couldn't.