Even though his errata slowed Háma down a little bit, he is still able to recycle tactics' often hugely impactful events very efficiently for a little while. And after you did it three times, you often have other avenues like Book of Eldacar available, meaning you can still use Háma to create decks that can recycle events like Thicket of Spears, Hour of Wrath or Charge into Battle every round almost as well as ever.
The upside there should be quite apparent, having these completely combat-altering effects available every round can be an easy way to either win you a game outright or at least solve combat entirely, potentially even for the whole table. But even less "extreme" options like Feint or Foe-hammer are very good options for his ability, while you can also go down some more tricky routes. I for example had a lot of fun combining Háma with Gwaihir's Debt or Wait no Longer.
In conclusion, Háma has not been hit nearly as hard by his errata as people sometimes claim - he can still be used as a crucial centerpiece in a variety of decks, be they geared towards solving combat wholistically, providing some very efficient "smaller-scale" upside or enabling really fun shenanigans. Furthermore, his attacking stats are quite decent, meaning he has not lost his status as a top-tier hero for me one bit.
Rating: 8.5/10