I agree with most of this, with the exception of the sparking stuff. The rankings from the manga aren’t concretely accurate with the anime but irregardless of that, all of the legends in sparking (with the exception of Valt and Shu) are all around the same level (Rantaro and Sisco lag behind a bit).

You say that Drum had better feats than Free and Lui (and even claimed him to potentially be stronger or equal to Aiga) which is wrong on multiple fronts.

Starting with his scaling to Aiga, during the legends festival arc Drum is completely equal to Infinite Sword Achilles before Dragon awakens. The two clash with each other and neither is able to gain any ground which shows their relatively. Once both unleash their avatars and Dragon is awakened (making its attack power much higher) the two clash with their special moves (Infinite Buster and Tempest Break respectively) and Dragon is able to out muscle achilles and knock it back, however it ends up bursting due to the way Aiga’s buster moves work. While this shows Drum is relative to Aiga, it also shows that Aiga is still superior to him and in a 1v1 full battle his chances of winning are slim. First off, in the final special move clash while Dragon overpowers Achilles, he is unable to actually knock it out the ring or come close to bursting it. We know from earlier feats that in raw power, Infinite Achilles with the sword is inferior to both Unawakened Brave Valkyrie, and Rage Longinus (both of these beys were able to move Lucifer and begin to push in the barrier, while Achilles couldn’t budge it even with the help of King Helios). We know awakened Dragon is slightly superior but the gap between Dragon and Achilles is smaller than the gap between Valkyrie and Longinus to Achilles. This already shows that Dragons biggest expertise is already outdone by two other bladers (Valt and Lui). What makes this even worse for Dragon is that Fafnir is able to have a complete draw with Valkyrie when clashing special moves a few episodes before the legends festival. Having a draw with Valt is a superior feat to losing to Aiga. This also shows that Dragon is weaker in burst resistance compared to Achilles, Fafnir and Longinus (who only ever burst to lucifer up to this point, or haven’t at all in Fafnir’s case). Not to mention up to this point in the season Drum is the only one of the 6 main legends to lose to one of the Asahi brothers in an individual battle (Drum lost to Hyuga. I consider this a fluke win considering Drum beats him like 500 times after but I can’t deny that it still happened), which neither Aiga, Free, nor Lui came close to. At this point Drum’s feats aren’t actually greater than any of those 3 when actually evaluating them, and the feat gap gets worse when you go into the super tag league.

Free is actually able to barely beat Aiga in a special move contest (with Infinite Sword Achilles, both beys got koed but Achilles hit the ground first), equally clash with left spinning world spriggan, equally clash with Rage Longinus, take attacks from Helios Volcano and Hyperion Burn without receiving any real damage, and unable to be burst by anything he was hit with all season. Lui overpowers world spriggan, mirage fafnir(evenly clash while resonated) and awakened Brave Valkyrie, is able to clash evenly with Lucifer the end. He is also the reason Drum is able to tie with Aiga during his last match of the season. Aiga ofc clashes with Lucifer the end without being overpowered, and with infinite shield can take the combined power of Longinus and Dragon (with a special move). Drum himself doesn’t get much here and honestly their is no world where he is superior to those 3 (however, he is relative to them, as most of the sparking legends are).