does this person have a name? I would love to watch it since every blue mage group I have ran with MUST be incompetent.

Most damage mitigation comes at a cost. as for soloing goes, blue mage has a spell called "basic instinct" here is what it does:
Increases movement speed by 30%, and healing magic potency and damage dealt by 100%. Also ignores the damage penalty inflicted by Mighty Guard.
Can only be used in duties intended for two or more players while playing alone, while no other party members are in the instance, or when all party members are incapacitated. Effect ends when joined by one or more party members.
Mighty Guard is the tank stance that reduces damage taken by 40% and damage dealt by 40% with the combination of the two it is fairly easy to solo content. however extremes on the other hand are harder but with the combination of the two, I can see it possible. however these two skills are not viable (nor usable as mighty guard serves no actual purpose in group play unless there is no tank.)

in group play blue mage is lack luster.

blue heals have short range compared to healers (and can hardly heal unless mimic healer and can burn through mp)

blue tanks done have enough survivability (without burning through all mp and spamming diamond back resulting in lack of agro)

blue dps is amazing solo (solo buffs)but in groups, seems below average.