Damage modifiers for normal dungeons/deep dungeon content

I've been thinking, what if dungeons and deep dungeons had damage/mitigation modifiers added for certain jobs that struggle more in said content, like they do for Frontlines.

For instance, because healers tend to hit the time limit in deep dungeons, there could be a modifier that lets them do about 10% more damage. Or because casters don’t have stun/interrupt to stop certain mobs, they could have a bit more defense. You could apply similar modifiers for normal dungeons too, like giving bard and astro a damage modifier since they’re DPS is reliant on having a full party. Maybe even giving dark knight a 10% mitigation modifier to help people who struggle playing the tank in dungeons.

I think this could be one way of balancing jobs a bit to said content without necessarily touching how jobs play in high end content, which high end players seem to be afraid of whenever someone suggests jobs need balancing in dungeons.

people would just exploit those kind of buffs to clear content even faster. modifiers are not necessary. DD's can be soloed. Party of 4 or less does not need extra help. The base "modifier" has and always will be PLAYER SKILL.