Another useful trick is duplicating Power Seals at Astur Hill in either Ch.7 or Ch.11.
When ever you start a new game after saving and reset, you start the game in a room where you can pick which chapter to go, and NG+ option is always available as well. Since there hasn't been a release for two years and the developers haven't posted anything for a year, it's safe to assume RC7-D is the final release.
http://tasvideos.org/userfiles/info/35435204418443453
Here is a WIP I made some time ago. The general idea is to grind enough BP in coliseum to get Green Dream and glitch one of the alternate final boss(either encounter the final boss from original game in Ch.5, or encounter a Lavos phase one reskin in the NG+ exclusive final battle):
https://www.youtube.com/watch?v=VsWMRGYwLxc
I will have to redo most of it. I was trying to grind some money for Glenn's weapon in Ch.8, but then I realized money cannot be transferred when I restart the game in NG+ so I have to purchase something before resetting and sell it. It might not even be worth it though.
Repeating the first 6 fights of Easy mode in coliseum with Magus solo for 10 times will grant enough BP for Green Dream, but a run like this might be too repetitive to get into Moon tier.