One of the more annoying ones I've seen is

Sai - Naruto - X
Orochimaru KT - Kabuto - X
X - X - X

Infinite clones from Kabuto, Naruto and Sai, and if one of them does manage to die, Orochimaru creates the Hashirama clone to replace it. Basically impossible to break through, since the clones regenerate every turn, and Ranked targeting is far from the best.