I would suggest lich, qop, sk, treant and silencer.

Lich's chain frost will be amplified by qop's wave. So they will badly damaged by then. Sk n treant rush in to do their ultimates while silencer activates global after treant's ult finishes. Lich n qop frost n shadow respectively to finish off any dying hero. How do ur think of tis lineup?
-terrence