According to the search results, there are different opinions on the best fighting style in Blox Fruits Sea 2. Here are some of the most mentioned fighting styles:

• Electric Claw: This fighting style is known for its agility, attack speed, and high damage. It is considered one of the best fighting styles in Blox Fruits as of the current meta. However, it is only obtainable in Sea 3.

• Sharkman Karate: This fighting style is mentioned as the best for grinding. It is also listed in the A tier of the Blox Fruits Fighting Styles tier list.

• God Human: This fighting style is considered the strongest in Blox Fruits. It has four attack moves and can be obtained by purchasing it from Ancient Monk NPC for 5,000,000 Beli and 5000 Fragments.

• Superhuman: This fighting style is unarguably the best in Blox Fruits because of its super high combo potential and good damage. It is listed in the S tier of the Blox Fruits Fighting Styles tier list.

It is important to note that the best fighting style may vary depending on the players playstyle and preferences.