For my roster Abyss>6.2>6.3>v1>6.1>v2,3,4>rttl>lol>act 5>uceq>rol (Lol is so low because I have a sig 200 maxed aegon, can fairly consistently do paths itemless with him)
So many parts of content need to have variable difficulty noted with *If you have [Specific Champion(s)]Now granted, more and more in the modern game that list of required champions to make content easier is getting broader, but it's still a factor
Honestly 6.2 > Abyss for me
Busy running my 2nd path in abyss, have yet to fully explore any of act 6.2/3/4. Abyss is MUCH easier & actually shorter than act 6 exploration overall for better rewards What the hell lol