-Mr. Buu should be in the same tier as Pure Buu, going off their fight. People usually forget that in favor of just usign the Evil + Good = Fat logic, ignoring that Good Buu and Mr. Buu simply can't be the same Buus unless Evil and Pure are also the same.
-Krillin, Yamcha, and Cyborg Tao belong more on the same tier as 22nd Budokai Goku, and I don't think there's really any point in making a distinction between old Piccolo and young Piccolo levels; they can be the same tier.
-Namek Krillin is missing. He should be at least a tier 21 or so. The other humans past the Saiyan arc are missing too, but that's understandable since Namek Krillin is the only one who has an officially stated battle power or really anything concrete on where he stands.
-The android arc base saiyans aren't really that much above initial Freeza and base Namek Goku to be a whole different tier, I don't think.
-Pui Pui's placement seems random, but I guess nothing contradicts it (base Vegeta could easily be twice that), so whatever.
-This tier list is probably underselling King Cold by placing him as weaker than the Buu arc base saiyans. They're supposed to be clearly inferior to Freeza even after five more years of training, while Cold rivals Freeza. Except for post-Z sword Gohan and the fusions, Buu arc base saiyans (and post-Buu arc arc base saiyans) should be in tier 14 (i.e. base/non-buff Freeza tier), along with Yakon and Cold.
-Putting Kaioshin below Cell Jr tier is underselling him. He was stated to be way, way stronger than Buu arc Piccolo, who is stronger than Cell arc Piccolo, who was at least able to stand against a Cell Jr. Kaioshin should be in a different tier compared to Piccolo.
-Dabra being SS2-tier is confirmed by multiple official sources and all the dialogue. He should be moved to tier 6.
-Movie 14 characters, but no others?
-Kibito should be in the same tier as Buu arc base Gohan, who if they're taking BOG into account is weaker than Freeza.
-Where is SS Gotenks? He should be in the SS3 Goku/Pure Buu tier.
Otherwise, it seems fine.
He was forced to commit suicide because he realized he couldn't win through any other way. Yamcha's Kamehameha did enough damage to the Saibaiman to convince him that he was superior than him.
That doesn't actually require it to significantly harm the Cultivar. If Yamcha proved to be even slightly superior, the Cultivar would still conclude that it couldn't win, as besides the suicide explosion it has nothing to make up for any power gap.
And I corrected you, because what you said was different from what Toriyama said.
No, it's not. I said Toriyama said Raditz was stronger than a Cultivar. Which he did.
Do you really think that Toriyama was a battle power-guy? Do you really think that he could remember everything from the manga that he is drawing for years, when he has repeatedly said how he easily forgets stuff? Taking about battle powers & power differences may be fun for some of us, but most of them are details inside the manga.
This isn't even a battle power thing. It's a basic "who is stronger than who" hierarchy. And yes, I expect Toriyama to remember his authorial intent at least as far back as a few chapters. The page has Nappa right there at 4,000. If he had truly meant for Nappa to be over seven thousand, that number wouldn't have been printed there. He also wouldn't have drawn Nappa being hurt by sub 4,000 power levels and completely outclassed by a ~5,000 power level, and he wouldn't refer to Nappa as a weakling with equal status to Raditz in his post-manga interviews.
Aren't you basically supporting my point with this? You keep trying to apply stringent gaps to power levels, even though Toriyama himself thinks they're silly and repeatedly shows them being violated.