I need help for Char selection

Alaigador

hello guys, I am 52level, exp is around %95 and I have 104.558bp. my formation is Sado - Main - Matsumoto - Rukia - Nanao. tomorrow I will be able to recruit shin zabimaru renji and normal renji.

but I dont know if I must replace matsumoto with one of them. I am thinking of going Sado - Main - Shin Renji - Rukia - Nanao but normal renji is not bad too. for PvP, who would you choose? matsumoto - shin renji - normal renji?