True on both accounts. I don't think it really matters who wins the battle, because G0-T0 can simply eliminate the victor. He doesn't operate in the same way these guys do. They just don't have the tools to deal with an opponent like G0-T0. They'll be fighting on his terms, not their own.
Malgus also wasn't quite as good of a tactician that Revan was...
Really though G0-T0 has this in the bag, the fact he has no real military forces aside from the HK-50s means that he quite simply won't show up for the major battles, while Grievous and Revan are slugging it out, G0-T0 will quietly be setting up the deaths of his opponents.
It's tough to take on an opponent that is operating by totally different set of rules than you are.