I was looking at the Rm subs and the stats for the ss5 is simular to the km ss5 so im assuming rm has a darn good ss5.

they get a small fp bonus for cv there torps do decent damage also.  DB's are not good.

Donno about bb's yet but there not as good as ppl crying about them say they are they go down like any other bb pretty much.  But elite boosted reload gunners are great for rm.

I havent tested but the AA looks horrific compaired to other nations.  singles with like 2.8sec reload is the best rm gets if i remember right.

.