Adding DRK to GLA would sort of render most of their abilities very situational, sure. Same as with Scholar. Do you think scholars are using Miasma, Bio II and the like in the middle of raid healing? Hardly. They're only using their DPS abilities when they aren't needed for healing.
DRK as a Job for GLA could "emergency" tank by dropping Darkside stance and using the standard Rage of Halone enmity combo. They'd suck at it compared to PLDs or WARs, but they'd still be better at it than MNKs or DRGs. Just like SCH and WHM DPS sucks compared to BLM or SMN, but they can do it if they need to.
DRK as a Job for GLA could "emergency" tank by dropping Darkside stance and using the standard Rage of Halone enmity combo. They'd suck at it compared to PLDs or WARs, but they'd still be better at it than MNKs or DRGs. Just like SCH and WHM DPS sucks compared to BLM or SMN, but they can do it if they need to.
attractive enmity device
