@Naoki Yoshida-> Make Samurai a Tank class!

[Shippuu]

What does PLD bring to the table with offensive magic? Sword Oath? Just because it uses MP? Flash? No dmg and not its purpose.

Now you're just moving the goalposts and making it something that is incredibly specific. You don't want a "magic themed" tank, because we have 2 of those, you want a very specific type of magic themed, spellcasting job.

We have no GCD Magic Casting Tank. Which is different and unique.

It's also impossible to implement into this game without a ton of special exceptions needing to be made to how casting works. The job would need to have either only instant cast spells (Which is no different then the other magic using tanks.) Or they can both move and not be interrupted from damage while casting spells, given tanks have to move often for all manner of reasons. Even if you do all that, none of that are things that can't be applied as well to a different job in a different way, even to Samurai. Samurai in some Final Fantasy games are strong magic attackers, in Tactics they summon spirits from their swords etc. And applying "cast times" to melee attacks/physical attacks is also something that can be done, as has been done in many MMO's specifically, where melee classes have charge up or even channeled abilities. Some from a gameplay mechanic perspective, those elements can be added to Samurai just as easily, and not necessarily restricted to just Red Mage.

The other glaring flaw with the premise of a tank that deals entirely in magic damage creates problems with encounters in the game. How would a tank who deals their damage via magic damage, tank enemies and bosses who become immune to magic damage? Such as the second boss in Void Ark? Or how about in Turn 4 Binding Coil, where some enemies have magic reflect aspects to them? Why would groups bring a tank that then takes extra damage for no reason from these enemies?

So they'd have to go through and remove all of those mechanics from fights where that was the problem (Or give this "mage tank" special exceptions which then, it literally doesn't matter what kind of damage type they deal) as well as then not being able to ever use that kind of mechanic in any future fight either.

That's not even touching the itemization issues that would come from this unless they wear heavy armor.