Do I seriously need to max tribe to unlock Master Mogzin??

[Infindox]

I have 152 Cards right now. Which card do you think is the worst to get, I mean like the beast tribes, which takes the most amount of time. Is it the annoying Blue Mage questline?

If you didn't do Eureka when it was current, you're gonna be annoyed to find out you need to get to Hydratos to get the cards.
G-Warrior isn't too bad, you just need one run (one totem) each of the Weapon EX fights, but that depends on your skill level. Memoria Miseria EX however is grind of that fight, and it's a slightly annoying fight.