Final Fantasy XIV’s healer problem and how it’s kind of unsolvable

[basketofseals]

As a result of all this work, each DPS player deals 10% more damage, each tank takes 5% less damage and deals 5% more, and each healer deals 5% more damage and heals for 5% more

...

Based on all of these changes, your party-wide DPS has increased by 60%.

That's.....really not how math works.