Hello trophy hunters. I made a video and uploaded it onto Youtube. It is a location of a farming spot in the second play through that will help you earn Master of War, These Go To Eleven & Mr Fancypants.
This is by far the easiest method that I found as you gain bolts, Raritanium, and level up weapons quick. you will earn roughly 30k-60k bolts in under a minute, so sooner or later you will have all the bolts and upgrades you need to achieve the three trophies.
Please if the video does help, leave a like and do subscribe. thank you