Alright,low rank would be mh1-mhfu monsters,then high rank would be monsters from tri-triG(including mhp3rd monsters) and lastly, G rank would be a couple frontier monsters mixed with previous monsters.But! it would be epic if there was every monster in the game(some frontier monsters and subspecies excluded perhaps) so it would be from rathalos to chameleos to laggiacrus to everything! However, I do also have an idea mentioned by people before me.So the rank system would still be around from low to G but you could also free rome to other villages were particular monsters rome(example: Barioth in pokke and Happurubokka in kokoto).You could travel to the past villages and NEW villages(maybe some from orage) via boat or balloon.It would still have the rank system were ever you may travel but free rome is far larger than the tri system eh.So thats basically it but I do have another more RPG like idea.So when you reach high rank you can become a class of sorts,like guild knight or guild guardian for blade masters or alchemists and trap makers(including bombs) for gunners.Its just an idea so due give me feedback on this class system in particular, you could also stay a hunter in this system as you don't have to be one of these,the guild classes are strictly for blade masters but the alchemist class is also for blade masters but harder to be come for them as opposed to gunners,trap makers are for gunners only though.So thats it,thank you for your time.