This list is based on how good the heat smash is in neutral and the speed (start-up frames)
the intention is to be as objective as possible, I know some players prefer the stance heat smashes because it enhances the stance mixup overall but in isolation, they are not as good as normal ones, these characters also have a normal heat smash.
Additional properties considered are wall splat / floor break etc, if a character doesn't have these it's a glaring weakness.
Time Stamps -
00:00 E Tier
00:16 D Tier
03:08 C Tier
05:40 B Tier
11:23 B+ Tier
14:31 A Tier
18:04 Top tier
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If you wish to share any clips or cool stuff. You can reach out to me on Twitter, would appreciate a sub.
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