Now that it's been confirmed that Orochimaru can summon Manda 2, it could probably solo.
Source please?
Databook #4 states that Manda 2 resides with all the snakes in Ryuuchidou so it's under the same contract as Manda and the pips.
So basically Manda 2 isn't Kabuto's exclusive summon.
I asked for source.