This seems to be an unbeatable team comp/strat: Siege-Split team.

Recently, I faced possibly the most annoying team comp: what I like to call the Siege-Split Comp. Enemy Team: Ziggs , Sivir , Nasus , Udyr , Blitzcrank . We got fairly fed from my roams as a Swain (unorthodox, I know) but we could do jack all in the grand scheme of things. It was clear to me when we defended mid lane from a three-four man siege utilizing Sivir and Ziggs (who weren't really fed at the time) and Blitz and Udyr were just there to help catch someone. Nasus could get inner turrets for free because it took the whole team to stop the mid push and because our AD Fizz couldn't 1v1 him anymore.

(Our team comp probably wasn't the best; AD Fizz top , Mid Swain, Jinx-Nami bot, and Nidalee Jungle, but this is just for in general).

Now, my question is this: how can one even handle such a bloody annoying comp? Lanes are always pushed mid game and it makes objective taking fairly easy for them. They got map advantage, they got objectives easily, making dragon hard to contest; it was ridiculous how easy it was for them despite being so behind and us being in the lead with kills. So how can you negate this sort of strat?