@USER_NAME_01 I think that RR ‘study’ of yours is very shallow, because it mostly presses on absolute values of RR rather than trying to revolve around how various builds actually perform.
If I learned anything from crucible speedrunners it is that the application speed and clunkiness is the most important factor when ranking RR skills, by far.
Veil of Shadow is simply the best RR skill in the game. You may say that it suits melee builds more and I would agree, but in practice there are many things that just try to maul your face anyway, as for ranged enemies there are mobility skills now.
Thermite Mines are the worst RR skill in the game, because of the time it takes for them to deploy. In theory you can place them and facetank, but in practice the current crucible and SR meta is that you need to be very mobile.
Everything else is somewhere in-between, with various quirks. E.g. melee builds and cdr casters would need at least some cast-speed to use CoF, DS and WoP well. Even though you group Guardians of Empyrion with VoS and Censure it is a more difficult skill to use due to them still being pets. Sometimes it’s just better to re-summon them mid-fight.
Then there’s another factor to consider. Someone already noted how the deeper into the skill tree the higher RR numbers tend to be. That’s a good point, but I feel like the more important thing is what the mastery brings to the table besides RR.
Veil of Shadow is perfectly okay here as well, because it supports all Nightblade damage types but Vitality.
Curse of Frailty has elemental RR, but there’s no abundance of elemental casters with Occultist because Occultist brings nothing for elemental to the table. That -%elemental on CoF is pretty much a pet thing.
Same thing about Word of Pain / Death Sentence. Yes, it is an RR skill, but Inquisitor is just not that good for aether and chaos, so it is shadowed by Censure. Moreover, unlike CoF you need to improve two other nodes for QoL and it even has a lower % than CoF, VoS and other things that are not that deep into skill tree and require less investment. It is probably the second worst RR skill after Thermites.
As for Devouring Swarm getting a whooping -60% to vitality there’s a thing that vitality is the most resisted damage type in the game, so you essentially need more RR if you play vitality.