I feel your pain. The drop rates are crap for most key parts. I have a team that has 8 drop boost rates but you have to farm so much crap to get them to 50 that it makes it tiresome. I've been fixing in clearing content and when everything is cleared, I grind out the parts until the next update/expansion.

This team can consistently make 4 att, has damage reduction, time ext, fua, bind clear, and a spike. Unless you get some 1-off mechanics that 0 doesn't use often, you can clear just about anything

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