Ok, let me rephrase it.
Large open symmetrical air stage with rails, that is enough to make tails overpowered.
And you want to add auto into the mix?
And another way, tails is pretty slow while flying. And now, imagine him with snipers that have auto attached to them.
And the only reason I bring up that, is because most of the people in kaysakado's net-game were tails. 4 people, including myself, were sonic, and the rest were tails. Although, I do suppose it is unfair to assume you are going to be tails. In that case...
Large open air stage, with 4 large snipe towers at the corners, multiple semi-high platforms in the middle, rails AT THE SNIPE TOWERS, and (2) autos in the middle platforms, combine that with the fact that the lower path is dangerous to take for fear of snipers, and enemies easily guarding your only way in to their base with rails, and we can't forget those platforms that ALWAYS make you stop moving for a second, leaving you susceptible for even more snipers, makes this level easy to conquer if you are tails(getting the weapon rings first is a must though), and even more easy to conquer if you alternate the middle and sniper towers for the weapon rings.
"Un-Vague" Enough for ya?