Actually, I fail to see how I was.Why are you still arguing with him? Several people besides yourself now have proven him wrong. He knows he's wrong. He just won't admit it and is arguing for the sake of arguing at this point. It's pretty clear.
Blazekev's point of view is something I resonated with or at least understood the most. You're better off arguing how Orochimaru does have Edo Tensei readily available to him (instigated the summoning for Edo Tensei before-hand) or should be considered in his arsenal rather than fabricating that Orochimaru doesn't have to undergo any preparations at all in order to use it.