Currently there is no lineup that works well for mb with roshi because he is not able to survive by itself long enough for them to work (the bee sst, cursed hidan roshi lineup with our current damage formula don't work). The only mains that let him survive long enough to let him be useful, actually, are crimson fist and azure fang.

eeee

I have been running a Roshi-LM team the past week and it was quite fun, it requires Sasuke to be skillbooked/trialed for his 20 hit chase and 2x chidori spear at least:

Omoi x x
x x Roshi
Sasuke LM x

Talents: 2,4,1,1,3
Summon: Serpent chase, any mystery except Shiba

There are obviously counters to this team of course as implied by Zelgadis (blitz/immune removal//dodge), but I am just enjoying the dmg from Roshi and Sasuke's 30 chase almost every round. Ideally this is what should happen:

Round 1, Omoi standard triggers chase
Round 2, Roshi mystery triggers chase, LM generates chakra for Sasuke's barrier
Round 3, LM and Sasuke mystery

x x x

Hanzo LM Roshi

Bee x x

Worked well for me.