You could take a dark/evil combination.
Like Vampire fruit, Dark fruit(complements Vampire as it's a dark creature), and Twist fruit(complements the dark fruit swallowing/attraction).
All three fruits help each other.
thanks for the chapter i would recommend.
1: Batto Batto no Mi, Model: Vampire.
2. Kyouzou Kyouzou No Mi. ( aka; Reflect )
3. Jiku Jiku no Mi. ( Aka; Space { Obito style } )
4. Osaeru Osaeru no Mi. ( Aka; restraint { Black clover Julius style } )
Vampire fruit can let you drink blood to live longer so that’s good for lifespan, the explosion fruit is absolutely busted if you could use it to its full potential unlike mr 5