How would you design Red Mage in FFXIV?

[Duelle]

with this in mind, how make a red mage without make it too powerfull?
- allows him to cast while moving? will simply be overpowered and will be nerfed (like the bard)
- how make the melee interesting when you can be safe at distance?
- how balance heal and dps? do like the healer?

by taking out the melee part of the red mage, you can have less trouble to make the class interesting. the gun will offer more freedom to them than the rapier.

So basically spit on everyone who has been giving suggestion for RDM while ignoring the core concept of RDM a second time. Your idea of balance is also lopsided. And you're purposely ignoring designs where magic and melee can work without any of the things you're mentioning interfering with balance.