Thank you SE for...

[Fyce]

Problem is, a group of BLU's generally can't complete dungeons/primals on their own. Their basic damage is sub par (without having dungeon /primal skills to enhance their dps) and they can't tank the content because even with mighty guard, they get hit like a truck.

I never claimed that BLU could do dungeons or primal on their own. I never denied that their damage is sub par or that they can't tank well enough. Why are you shoving this in my face? That's not what I was talking about at all. You accuse me of making a strawman, yet you are either missing my point of moving goalposts.
I argued against people using the "it was sold as a solo job!" argument blindly, to demonstrate that it wasn't a "solo job" and was not presented that way. That's all.

If you want to disagree with me and show me how SE claimed that Blue Mage was exclusively a solo job and could learn all of its skills solo, you're more than welcome to. But that would mean somehow showing that the objective proofs about Square Enix mentioning party play and progression are false... Good luck with that.

Anyway, I don't disagree with what you just said. It's just simply irrelevant to the point of my initial post.

-SNIP-

My bad, 26. I miscounted. 3 of those can be obtained in the MC, but can be hard to get. 1 Can be obtained via the right leve. One Via the overworld

New total 21 out of 49 require dungeons / primals

Put these skill names in a spoiler tag, would you? It's still fresh content and I don't think you'd want to take the risk of spoiling anyone, especially in a thread with such a stupid clickbait title.

Anyway could you please explain your reasoning behind arbitrarily excluding all the skills that you can get solo in dungeons by simply checking the undersized party option?
And also, explain why you are not considering the alternative methods to get some of these skills outside of dungeons? You even make mention of some alternatives, but still list them in your "can't get solo" list. Why?

Cannot be obtained solo:
Sharpened Knife
Song of Torment
Ink Jet
4- Tonze Weight
Aqua Breath
Missile
Flying Frenzy

Can be obtained solo:
Ram's Voice - Carnival or undersize
Dragon's Voice - Carnival or undersize
Fire Angon - Undersize
Lvl 5 Petrify - Undersize
Plains Cracker - Overworld enemy
Flame Thrower - Undersize
Diamondback - Undersize
High Voltage - Undersize
Mind Blast - Undersize
Glower - Undersize
The Look - Leve Quest
Snort - Carnival

Other:
Tail Screw - This one is debatable. The boss can be killed solo but waiting 'til he does the skill is suicidal, and there are Lv61 overworld enemies which are quite hard but I think doable.

Out of the 20 skills you listed for "Dungeons" skills, only 7 of them are not realistically obtainable solo. I'll give you the last "weird" one, so 8. Plus 6 primals, that's "only" 14 out of 49. And these skills are far from being mandatory.
That's quite far from the 28/49 you claimed to be unobtainable while playing solo.