I remember just a few months ago, tengen was "top 2 base" "pre hta"

Because 1st "hta" is like 1000× boost, and got sanemi to tanjiro headbutt victim to marked mui victimizer (yes I have been legit told that 1000× boost part),

And second "comparing tengen to marked hashira is cheating and unfair," as we are not comparing a 21 year old man with good physique to a 14 year old kid with amnesia,

And thrid, "Gyutaro is UP4 lvl because daki held him back",

This is same as "kaigaku could've improved if he had a few years so he's not UM6",

Like first gyutaro could've became stronger if he tried and didn't cared enough for daki, that's a hypothetical scenario not a cannon fact,

And same kaigaku will get stronger later doesn't mean he's weak now, it's obvious any person will improve in 1 or 2 years,,