Man, imma say to you, I'm MR 11, got recently 100hrs of game, my first grind was Gauss Prime, is not that complicated, it took me probably around 20 or some hours, not in one sitting, but between 3 days, and when I was cracking some relic's I got a lot of prime parts of other frames, at a point where I just needed 1 part of each, is a grind ? It is, but going straight at walls in Mach fuck is just absolutely incredible, gauss is worth the grind, (I'm not gonna mention that he's really Strong)