We've never seen Robo-men fight. What if their cpu's network and they manage to fight together with the precision of a synchronized swimming squad?
Well, they do move in synchronization. There's a famous shot in DIOE where two of them turn their heads in perfect unison. Very eerie. Also, when capturing the Doctor and Ian, they raise their whips and speak in unison.
Having said that, they are slow moving, not particularly coordinated, and, based on what we've seen on screen, possessing no greater strength or endurance. Indeed, given their apparent poor health, they're probably worse than an average human. So even if they are all perfectly synchronized, there would be few occasions where that would make any real difference.
Dalek is old Skaro for "God" apparently.
Never heard that before. Source?
Then again, the principle of coalhill School from Remembrance of the daleks was a Robo-Man, Just a far more advanced model that he only needed a clip on the back of his neck to maintain total domination compared to all that head gear from the dalek invasion, but it does prove that Robo-men are capable of preforming precise and complicated tasks if the needs be.
The head teacher was being mind controlled. I don't know one way or another if that counts as him being a roboman (the term usually applies to humans that have been adapted via a surgically invasive procedure to be used as expendable troops). Even if he does count, it makes little difference. He had no combat advantages, no superior strength or endurance. He was incapacitated by Ace kneeing him in the goolies, so I don't think he could resist an Ogron ripping his head off.
Perhaps, with their knowledge of science, the Daleks could develop a new type of roboman that could defeat an Ogron. But the lads seen in DIOE? No chance.