With this build, a double assassin + double warrior team is favorable.
Jaina + Greymane + Uther + Anubarak + Piano Garrosh.

The goal is to basically apply CC upon the enemy at all times. You do not have much waveclear, so pairing with strong waveclear heroes is absolutely vital. Having heroes that benefit from attacking heroes affected by slows are also extremely valuable.

This Garrosh relies upon heavy comboing for maximum effect, but this build is truly an enemy team's bane when played adeptly.

Piano Garrosh is a ward slapping damage with an axe, applying CC to enemies and an escape route for divers in need of re-engagement or retreat.