Well, it's a tough call. Blackbeard's ambition and diverse powers might give him an edge, but Boa Hancock's charm and combat skills can't be underestimated. The outcome would likely be determined by their tactics and the environment of the battle.
I think it could go either way. Boa Hancock is incredibly powerful, but Blackbeard is very cunning and has absorbed multiple devil fruits. It would depend on the circumstances and how they used their skills.
A practical answer is Chapter 130, because it turns the idea into a concrete scene. The chapter opens with This task, the first one, should have been his in the bag., adds pressure through Not to mention Wen Jiaojiao, who was still lying in the hospital on an IV..., and ends on Normally, the best.
If you want the clearest chapter reference, go to Chapter 136. Early on, A few people retraced their steps back to the place they had just been.; later, the chapter leans on They continued straight up the mountain path until the trees became denser....
Look to Chapter 95 for the clearest answer. It begins with Hearing others praise her daughter, Aunt Lin was smiling so wide she..., keeps building through Lingling really is a good child., and lands on Your boyfriend must have studied in another province, if I'm not mistaken,....
Chapter 110 is the strongest chapter-level answer because it starts from Jiang Li, carrying a wooden basin, walked over to the well. and follows through on My parents died, and fortunately, Daddy found and took me in..
The best chapter pointer here is Chapter 150, "Has She Been Cursed?!". It opens with Upon hearing the first part of Jiang Li's words, Zhang Cheng dismissed... and closes on He spent the last few days visiting various renowned doctors, while also....
The best chapter pointer here is Chapter 136, "Jiang Li Can Actually Draw Talismans?!". It opens with A few people retraced their steps back to the place they had just been. and closes on Aunt Ying and the camera PD arrived soon after..
If you want the clearest chapter reference, go to Chapter 149. Early on, Seeing that Zhang Cheng's glass was nearly empty, Du Qinglian immediately...; later, the chapter leans on Director Zhang, this Zuichun Mountain is a specialty of Bi Garden, brewed....
Look to Chapter 135 for the clearest answer. It begins with The sun blazed down mercilessly, but thankfully, the path to the mountain..., keeps building through Zhao Lang was also very humorous, and even the usually stoic Jiang Li..., and lands on Are you healed from your injuries?" Zhao Lang.
Chapter 134 is the strongest chapter-level answer because it starts from After a brief noon rest, the production team was up to their antics again. and follows through on [Are you kidding me, is Jiang Li putting on an act again?.
The best chapter pointer here is Chapter 111, "From now on, Zhao Daniu is my new brother!". It opens with The main room's door was pushed open just a crack, and the head of the... and closes on This time it was in a dream..