Questionable Mr strat

So I was talking to my buddy who started playing kinda recently (Mr 4) and he recently bought gauss with plat and fell in love. He really doesn’t want to have to upgrade another frame because he just loves gauss so much. So he asked my why he couldn’t just do companions instead because the give the same mr points as a war frame and they are fairly easy to get and farm. What do you guys think of his strat?