I think it's just a difference in opinions, and how literal things get interpreted. I understand the concept and desire, but I just think it can get a bit arbitrary potentially, taken a bit too far. When I'm doing analysis, I try to do a 1:1 conversion as best I can. I get trying to give some benefit to systems that work in-game and don't translate well, as well as the opposite, I just. Too different lines or reasoning, both valid if you view things that way.
As for Nyarly...uh...he's not Strong: All. Guido's the only boss who is. Nyarlathotep is a form-chain, which helps (I think your buffs get need recast, but HP and SP stay the same, with no transition to the menu screen between them). First form (Moon Howler) varies based on how you answered the scenarios to restore Lisa and Eikichi's memories: HP is 8160-9560, defense ranging from slightly above average to solidly above. Always Void: Dark/Almighty/Nerve/Mind. Has weaknesses in his weakest forms - both water and wind if you restored neither memory, just wind if you restored just one, and none if you restored them both. Moon Howler's skillset also changes, but always contains Shadow Kill and Unperishable Black, with possible additional skills including Megidolaon, Guard Punish, and Omega Cluster. Crawling Chaos is a bit different - no weaknesses, Void: Dark/Nerve/Mind. His defenses are significantly higher than other enemies in the area (actually, highest in the game) - ends up being about 35% reduction on both sides. Fusions help break that with their multipliers (so you'll still see 1000+ damage skills), but again, they slow things down. 18000 HP goes down fairly slowly as such, unless you're packing high level personas with Hieros Glupaine, etc. For this fight, again, all he really cares about is Shadow Kill anyway. If you allow the form-chain, it's a very easy win. Moon Howler is a constant 66 AGI, which is...above average. Crawling Chaos is 85 AGI, which is, again, pretty close to 1.5x average, depending on build (DL-build, no more, maybe a bit less; normal in-game, higher, since you're replacing AGI boosts at level-up for TEC, etc.). It's turn-based speed, but still respectable.
If he were Strong: All, you'd be seeing a 75% reduction or so in damage.
