Which kuudra armor to invest in first?

[Mizunei]

I already have a hype , somewhat decent mp and I am thinking within a month max 2 to start towards the eman 7 for term. My question is which armor should I buy/invest money into in terms of usefulness/ unlock or make the game way easier. A full crimson armor for melee stuff like diana and slayers , aurora armor for full mage or the terror armor?

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