This is a speculation of Luffy versus past villains with his skillset, Haki mastery, and current devil fruit capabilities, and how I think a low diff or what a max single attack Luffy would need. For some opponents he might knock them out for an extended period of time with the particular move he uses.
Current Luffy: Future Sight (FS), Advanced Observation (CoO), Advanced Ryuo (CoA), Basic CoC, Mastered Gear Fourth [Possible/debatable Gear 5]
Higuma the Bear ~ CoC
Porchemy ~ CoC
Captain Blue Jam ~ CoC
Alvida ~ Regular unnamed punch
Axe Hand Morgan ~ Gomu Gomu No Pistol
Buggy ~ Gear Fourth Boundman with Ryuo and FS
Kuro ~ Gomu Gomu No Rocket
Don Krieg ~ Gomu Gomu No Bullet
Arlong ~ Gomu Gomu No Rifle
Smoker (current) ~ Gomu Gomu No Jet Gatling Gun
Mr.3 ~ Gomu Gomu No (CoA) Bullet (Note: Mr.3 hasn't shown growth and is assumed stagnant since MF)
Crocodile (current) ~ Gomu Gomu No (CoA) Jet Gatling Gun
Foxy ~ Gear Fourth Snakeman, Jet Culverin (nah just a G2 Pistol should do)
Aokiji (Current) ~ N/A
Enel ~ Gomu Gomu No (CoA) Bazooka
Rob Lucci (Current) ~ Gomu Gomu No (CoA Ryuo) Jet Gatling Gun
Moria ~ Gomu Gomu No (CoA Ryuo) Elephant Gun [which is basically Red Roc, no] (Note: Moria hasn't shown growth and is assumed stagnant since MF)
Pacifista ~ Gomu Gomu No (CoA) Bullet
Magellan ~ Gomu Gomu No (CoA Ryuo) Elephant Gatling Gun
Blackbeard (Impel Down) ~ Gomu Gomu No (CoA Ryuo)
Hody ~ Gomu Gomu No (CoA Ryuo) Pistol
Caesar ~ Gomu Gomu No (CoA Ryuo) Gatling Gun
Fatfuck Lion Gifter (forgot his name) ~ Gomu Gomu No Jet Rocket
Donquixote Doflamingo ~ Finishing Move: Gear Second: Gomu Gomu No (CoA Ryuo) Elephant Gatling Gun [MID DIFF]
Charlotte Cracker ~ Finishing Move: Gomu Gomu No (CoA Ryuo) Grizzly Magnum [MID DIFF]
Charlotte Katakuri ~ Finishing Move: Gear Fourth Snakeman: Gomu Gomu No (CoA Ryuo) King Cobra [EXTREME DIFF] [Note: I think Kat Yonko Level Post Wano]
Queen ~ Finishing Move: Gear Third: Gomu Gomu No (CoA Ryuo) Elephant Gatling [MID DIFF]
Ulti & Page One (same time) ~ Finishing Move: Gear Second: Gomu Gomu No (CoA Ryuo) Elephant Gatling [LOW DIFF]
Ling ~ Gear Second: Gomu Gomu No Jet Pistol (No CoA no CoO) [LOW DIFF]
What y'all think? Anyone I miss?
Thank you for reading! Like. Comment. Subscribe.
Current Luffy: Future Sight (FS), Advanced Observation (CoO), Advanced Ryuo (CoA), Basic CoC, Mastered Gear Fourth [Possible/debatable Gear 5]
Higuma the Bear ~ CoC
Porchemy ~ CoC
Captain Blue Jam ~ CoC
Alvida ~ Regular unnamed punch
Axe Hand Morgan ~ Gomu Gomu No Pistol
Buggy ~ Gear Fourth Boundman with Ryuo and FS
Kuro ~ Gomu Gomu No Rocket
Don Krieg ~ Gomu Gomu No Bullet
Arlong ~ Gomu Gomu No Rifle
Smoker (current) ~ Gomu Gomu No Jet Gatling Gun
Mr.3 ~ Gomu Gomu No (CoA) Bullet (Note: Mr.3 hasn't shown growth and is assumed stagnant since MF)
Crocodile (current) ~ Gomu Gomu No (CoA) Jet Gatling Gun
Foxy ~ Gear Fourth Snakeman, Jet Culverin (nah just a G2 Pistol should do)
Aokiji (Current) ~ N/A
Enel ~ Gomu Gomu No (CoA) Bazooka
Rob Lucci (Current) ~ Gomu Gomu No (CoA Ryuo) Jet Gatling Gun
Moria ~ Gomu Gomu No (CoA Ryuo) Elephant Gun [which is basically Red Roc, no] (Note: Moria hasn't shown growth and is assumed stagnant since MF)
Pacifista ~ Gomu Gomu No (CoA) Bullet
Magellan ~ Gomu Gomu No (CoA Ryuo) Elephant Gatling Gun
Blackbeard (Impel Down) ~ Gomu Gomu No (CoA Ryuo)
Hody ~ Gomu Gomu No (CoA Ryuo) Pistol
Caesar ~ Gomu Gomu No (CoA Ryuo) Gatling Gun
Fatfuck Lion Gifter (forgot his name) ~ Gomu Gomu No Jet Rocket
Donquixote Doflamingo ~ Finishing Move: Gear Second: Gomu Gomu No (CoA Ryuo) Elephant Gatling Gun [MID DIFF]
Charlotte Cracker ~ Finishing Move: Gomu Gomu No (CoA Ryuo) Grizzly Magnum [MID DIFF]
Charlotte Katakuri ~ Finishing Move: Gear Fourth Snakeman: Gomu Gomu No (CoA Ryuo) King Cobra [EXTREME DIFF] [Note: I think Kat Yonko Level Post Wano]
Queen ~ Finishing Move: Gear Third: Gomu Gomu No (CoA Ryuo) Elephant Gatling [MID DIFF]
Ulti & Page One (same time) ~ Finishing Move: Gear Second: Gomu Gomu No (CoA Ryuo) Elephant Gatling [LOW DIFF]
Ling ~ Gear Second: Gomu Gomu No Jet Pistol (No CoA no CoO) [LOW DIFF]
What y'all think? Anyone I miss? Thank you for reading! Like. Comment. Subscribe.
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