Hel-Revenants are just another version of Revenant Hags, and so the same tactics apply.
Revenants are witch-like creatures that can summon annoying Nightmares if they're left alone for too long. They can be tricky opponents since they have quite large health pools, but once you break down their individual threats, they're not a big deal.
Their most common attack is a ranged blast that travels along the ground. It's a pain to deal with because you have little choice but to block it, and wait before you can close in. Still, with a bit of patience, you can get in there and start dishing out the pain.
That is, if the Revenant doesn't zip out of the way first. Locking one down can be a real hassle, so have Atreus fire off some arrows to pin them in place. This is definitely the most efficient strategy, whether you're in melee range or not, as arrow hits will stop them from performing other actions.
How many Hel-Revenants have you smashed into submission? Be sure to check out our full God of War Ragnarok guide for information on how to beat every enemy, and much more.