Okay, so I know its still less than a week since Monarch dropped (you see what I did there?) but I have been having a hard time dealing with it in my Northstar, because I struggle to do consistent damage at range that the shield steal and battery mechanics don't mitigate, and up close, you're obviously kind of screwed. I don't have much problem beating up on every other titan in the game but right now Monarch is kind of in the same "how do I deal with this?!" spot that Tone originally was.
Rather than whine and moan, though, I want to see what kind of tips you all have so far for beating Monarch in a one on one.