It's a similar concept to the tag to assemble your crew that I saw on the Tekking channel The difference is that in that tag basically you can go totally nonsense and pick anything except the yonkous, like you can put Akainu on your crew and he will cooperate with everyone but here I can go even more bonkers. even so I still want to keep my initial concept of this tag, my mvp will be Douglas Bullet, since the reason the movie gave him to lose was "he has no friends!", so I decided to give him friends, I want to give one a reason for everyone I choose on crew collaborate with me, the captain of the crew is my fan character, he has observation haki and armament nothing very fancy, but he has kari kari no mi カリカリの実 (charisma fruit) think as if it were Tama's fruit only that works with physical contact and with anyone, it also gives the average power of all my allies to all allies (suppose I have 10 power and Bullet 9990, 10 + 9990 = 10000/2, in both we gain 5000 power, rpg bullshit logic) The crew will be formed in the 9 supports 1 DPS style you know.
Talking about the crew now, I took Wapol and Queen (don't laugh), Wapol fruit is underrated, Queen as an engineer can come with clever ideas to fuse metals and stuff, like a Wapol Metal MK2, and then make a new catapult submarine for Bullet with that metal, plus I'm going to put Caesar in the mix because bioweapons with Queen is fun I also pick Moria for the same reason, he has a versatile fruit as hell, with him I can make a Nightmare Bullet, it would be cool as hell, took Byrnndi World because of the Moa Moa no mi, make Catapult Submarine 2.0 100 times more strong, fast and bigger, make Ivankov inject stimulants into Bullet's body, while this is happening I have Bartholomeo on backrow making barriers to make Bullet even more invincible, along with Bart I have Bello Betty, simply boosting everyone even more and still have my fruit in play, imagine Bullet merging with this submarine and all these boosts, apart from these I chose to put Katakuri and Yamato for other fighters (because these two only go up in my concept, mainly by their flashbacks) also Shiryu (without Suke Suke no mi), because my crew is a devil fruit powerhouse and I will need someone who can swim in case things go wrong, I also want to vary from the bunch, always choosing mihawk and zoro, more people who can swim would be nice too, I go with Shiarly because she is hot...I mean her vision of the future is useful, Crocus for medical reasons and Laboon of course, to finish i want to put the random guy that every crew has, i will put Shura from Skypiea arc, i like his design, arguably the hardest Ordeal, more variety for the crew, air action and he can rescue members if they fall into the water.