New South Wales
Where is this clarified in the rules books?
What do you want clarified? That you can't push the Boss? If so it's here:
MvM Rules - Push wrote:
Player Mechs simply stomp Minions instead of pushing
them, and cannot push the Boss Mech.
Can you use the skewer or the omnistop to take away damage, (assuming a rune has been uncovered).
I don't know what you mean about Omnistomp, it just lets you move sideways. Skewer cannot damage the Boss, but incoming Boss damage could be prevented by discarding the Minion from Skewer if you have one.
I know you cant use the ripsaw ability, which made me wonder how immune to damage he is...
He is not immune to Ripsaw. If that Rune Shield is down, a Ripsaw could hurt him, immediately putting the Shield back up. The discussion of the Boss blocking Ripsaw is to say the other Ripsaws won't go past the Boss.