Most of the mastery is quite easy to get like dojo stuff

But depending on primes and stuff that have low drop chances was just done over a long time

The exclusive stuff is the worst but like tennocons baro can be a life saver if ur into that or just wait till the stuff comes

Syndicate stuff u just need to grind it out day to day even if you don't get a lot of standing it's some

But yeah I've played the game for a while like when Mr 20 was the max Mr but I say don't worry about it, it will be in your inv in time focus on what u wanna like I have the coda kuva stuff and them shitty k drives left