I think you might as well just play the game normally if you're going to go through that much effort. A lot of the trophies just happen as you play, and the ones you have to try for aren't really all that bad. You need some luck, but also need to just learn how to play and get better. You'll get them soon enough.
Also, for Merciless Victory, you do have to double pip at the end. It's been this way since an update to the rank system a few months ago. 4 kills gets you a lot of those points but you need to do a lot of other things too because that isn't enough on it's own. You should get as many hook events as you can get (so don't camp), break pallets, break gens and keep them from being done, get lots of hits in, and do well in chases... You really just have to do your best and hope it was enough in the end lol