Oxford University just announced another moot called the Oxford India Moot with an unprecedented scale; this constitutional law moot is offering free registration and multiple teams per college with the prize being scholarship to Oxford University for post graduation.
http://www.oxfordmoot.in/
Do check it out. I guess it should be included because it would be competitive enough with such features.
NLS Tax is indeed a good moot. Another thing, the NLU Jodhpur Antitrust moot and the NLU Delhi Corporate Law moot are better than the two Surana moots in tier four, so upgrade these to the same tier or downgrade the Surana Moots to tier five. And Surana Trial Advocacy East should be out of the MPL. I am not too sure about the Amity International moot but absence of top teams does speak a bit about it. Also, the new RGNUL moot should not be anywhere near the MPL.