try this

use hinata, sasuke, kakashi. this ninja have 2 chase skill and doble additional status

formation :

put hinata in 4

main 6

sasuke 7

kakashi 9

tactics :

ghost kill (min lvl 2)

talent :

chidori blade shadow, beam of light, lightning sword, lightning style enhancement, bloodthirsty demon

summon :

flood dragon

i use this and i garanted you make 10-11 combo. have fun.