Blue mage shouldnt be "Limited"

[Koka-Kola]

White Wind isn't spammable, but just one single cast of it by a Blue mage in full health can completely heal the tank taking a big tank buster, or multiple people that decided not not move from aoe, that's WAY stronger than Vercure of the Dancer's heal. Unavoidable AoEs almost never fully blasts the party's HP (at least at once), so 2 White Winds from 2 different blue mage dpsers can even null the need of an actual second healer.

Diamondback's duration is so big that will let you ignore key mechanics from a fight... Why not have a party full of Blue Mages dpsers and worry less about stressful mechanics?

Aetherial Mimicry can literally let you have 1 healer and 1 tank be full fledged dpsers while their roles aren't needed.

Cactguard cast by a tank is a -15% spammable dmg reduction... Thus it would be optimal for your offtank always be a Blue Mage, to keep that on the main tank.

You're generalizing a lot there. Your point is valid in which you say that Blue Mages have the dps complexity, but those examples that I listed, and many others can literally break the balance of a fight, especially in Savage modes. If this doesn't let you see how the limited status is needed for how Blue Mages are at the moment, then I don't know how else I can put it into perspective...

White wind at full health yes, but anywhere below 50%, not worth it. its cost is too great to use often. Diamond backs cost is 3000 MP and lasts 10 seconds(No mp recover when active). It only reduces your damage taken by 90%. Now insta kill mechanics cannot be dodged or ignored. With that in mind all of the tanks CD's are better that diamond back for those reasons. I mean gunbreaker is invincible for 10 seconds AND can move freely. Quite the difference there. Diamond back does NOT allow you to skip mechanics unless you are over geared (Just as other jobs could) Now Aetherial Mimicry (Mimics a targets role: DPS gets 20% crit chance, healer adds additional effects to some healing skills, tank adds some damage reduction) is a solid point but blue mage cannot out heal or out tank a normal healer or tank (Just as most casters can dos and heal.) Diamond back is not spammable(3000 cost with no MP recovery when active), mighty guard, cactguard and even aetherial mimicry cannot make up for an actual tank class since tanks get significantly more health and have more tank skills. Ive seen it all too much where a member in a blue farming group had to swap to an ACTUAL healer or tank (Synced) because blue cannot do what those roles do best. Also what is stopping a blue mage as entering a dungeon as a tank or healer? well as a DPS class, why would you queue as a tank? You dont get a fast queue, and you dont do the job that well and if they did queue as such then that is just as bad as healers or tanks queueing and saying "I am DPSing." (Happens often)

[ForteNightshade]

White wind at full health yes, but anywhere below 50%, not worth it. its cost is too great to use often. Diamond backs cost is 3000 MP and lasts 10 seconds(No mp recover when active). It only reduces your damage taken by 90%. Now insta kill mechanics cannot be dodged or ignored. With that in mind all of the tanks CD's are better that diamond back for those reasons. I mean gunbreaker is invincible for 10 seconds AND can move freely. Quite the difference there. Diamond back does NOT allow you to skip mechanics unless you are over geared (Just as other jobs could) Now Aetherial Mimicry (Mimics a targets role: DPS gets 20% crit chance, healer adds additional effects to some healing skills, tank adds some damage reduction) is a solid point but blue mage cannot out heal or out tank a normal healer or tank (Just as most casters can dos and heal.) Diamond back is not spammable(3000 cost with no MP recovery when active), mighty guard, cactguard and even aetherial mimicry cannot make up for an actual tank class since tanks get significantly more health and have more tank skills. Ive seen it all too much where a member in a blue farming group had to swap to an ACTUAL healer or tank (Synced) because blue cannot do what those roles do best. Also what is stopping a blue mage as entering a dungeon as a tank or healer? well as a DPS class, why would you queue as a tank? You dont get a fast queue, and you dont do the job that well and if they did queue as such then that is just as bad as healers or tanks queueing and saying "I am DPSing." (Happens often)

I want to put some things into perspective for you because your assessments grossly underestimate how utterly broken Blue Mage would be in regular content.

A Caster at level 80 with 50% HP will still heal for substantially more than any actual healer is capable of. 90% damage reduction is more than tank LB3. This effectively makes it the equivalent of a tank invulnerability. So yes, it does allow you to skip mechanics because their damage is made laughable. To emphasis this point, there is literally nothing E12S can do to damage a Blue Mage tank/heal combo. She simply doesn't deal remotely enough damage or have any mechanics that would be threatening. A full Blue Mage would be laughably overpowered to the point of rendering every other job complete obsolete.