I’ve seen Danny saying he does just fine against T5 heralds using a traditional hammer setup. Since it doesn’t really rely on a merc it’ll probably be fairly consistent as long as you don’t get 1-tapped by some combo.
Yeah undeads are just the worst for Merc, can't survive the 15 minions dmg + Herald bcos no leech.
And I'll gladly use a full rejuv to bring mana back to full instead of going and revive the merc who will die again anyways x)
But then WL > Hdin > The other builds ? Regarding T5 P8 herald killing.