I've gave this some thought and there's 2 devil fruits that imo would be the strongest amongst all devil fruits.
- Mizu Mizu No Mi. (Water fruit) The user of this fruit would firstly , be logia. Secondly he has the ability to defeat any devil fruit user easily since their so vulnerable to water. heck the guy would be able to control the ocean (he just has to make sure he doesn't fall into it himself).
- Kaze Kaze No Mi. (Wind fruit) Another logia. The thing about wind is that it can grow infinitely stronger , it has no limits. Wind even overpowers water. I don't think even Akainus df could compare to it. Imo this would be the strongest df of all time. I think Oda is saving these two fruits because he knows they would make extremely powerful opponents. O_O
- Mizu Mizu No Mi. (Water fruit) The user of this fruit would firstly , be logia. Secondly he has the ability to defeat any devil fruit user easily since their so vulnerable to water. heck the guy would be able to control the ocean (he just has to make sure he doesn't fall into it himself).
- Kaze Kaze No Mi. (Wind fruit) Another logia. The thing about wind is that it can grow infinitely stronger , it has no limits. Wind even overpowers water. I don't think even Akainus df could compare to it. Imo this would be the strongest df of all time. I think Oda is saving these two fruits because he knows they would make extremely powerful opponents. O_O