i just said ultimates because of the "all-round" capability. Cerberus is a very much "all-rounder", doing reasonable damage, with quick speed. And of course his seemingly endless combos.
Agni and Rudra are quick, similar to Cerberus, but with high time. this was just my best combination that i found throughout the game. Beowulf is far to slow for me, although high damage is incurred.