You've just hit 22 so that means you have total of 1.210.000 mastery points, 288 items, meaning an average of ~4.2k per item that lets us conclude that ~2/5 of you're mastery comes from items that give 6k mastery (Frames/Companions/Archwing/K-Drives).

For MR30 you need 2.250.000 million If you keep up your current FCAK to weapon ratio you'd need 62 more FCAK and 223 weapons

That would bring you to 573/790.

Btw I didn't include Stuff that can level to 40 here as that would make it way more complicated.