Before getting the approval from
@RandomGuy2345 about Ururu's inclusion, I had to confirm her AP. I looked into it & posted about it.
Here's what I found:
RandomGuy2345: What's her AP? If the AP is fine, then she can be used.
Ururu Tsumugiya:
Attack Potency: Town level (Easily overpowered Base
Yylfordt)
Yylfordt:
Attack Potency: Town level (Defeated 20% Bankai
Renji easily),
higher with Resurrección (Lethally injured
Ururu, who had been previously been easily overpowering him)
Renji:
Attack Potency: Town level+ (Much greater reiatsu than
Ikkaku according to Ganju Shiba),
higher with Bankai (Somewhat pressured a Shikai using
Byakuya and got him onto his knee, though it should be noted that he was no match once Byakuya got fully serious)
Ikkaku:
Attack Potency: Town level+ (Should be the same as his durability, given how reiatsu works),
higher with Bankai (Started releasing far more powerful reiatsu than in Shikai and it only kept on increasing as noted by Edrad Liones)
Durability: Town level+ (
Blocked this attack in Shikai and then went on to release his Bankai and continue fighting)
Calc! Calc Yield?
61.698017404004502851 Kilotons of TNT
....Unfortunately, the Calc is Unevaluated, so use with caution.
Anyway, assuming the Calc is Valid (IIRC, there was some thing some time ago back where blog posts got deleted for some reason, & I'd be surprised if a HST 'Verse's big-scaling-chain-important Calc wasn't evaluated at SOME point in nearly 4 years (It was published on January 18th, 2018.).)
So.... Ururu scales to overpowering a Town Level (Yylfordt) who easily defeated a different Town Level that had 20% Bankai (20% Bankai Renji). Since Renji is "higher with Bankai", & he had 20%, that probably means him defeating like that also makes the scaling to Ikkaku part of his justification relevant, just that Renji was 20% stronger than that. Ikkaku is the one who casually did the 61.698 kiloton durability feat.
61.698 kilotons<Casual Ikkaku<Renji is much greater than Ikkaku<Since with Bankai has a separate section in that key for his AP, 20% Bankai Renji is probably 20% greater than him without it, & thus, even higher<Casual Yylfordt<Ururu easily defeated Yylfordt.
Depending on the one-shot range for the verse, she could be very high above the 61.698 kiloton scaling point or not much higher. If it's like, only need 10% stronger to one-shot, she might not break 100; Keep in mind that 7.5x is only for determining how much to one-shot OTHER PARTICIPANTS IN A VERSUS THREAD, & isn't relevant at all for what the one-shot range within a 'verse is.
That help?