Baldur's Gate 3 - Ketheric Thorm and Apostle of Myrkul - Honour ruleset with legendary action

Level 9 Party setup:
Aerendil - 4 Lvl Thief Rogue, 5 Lvl Gloom Stalker Ranger (Player 1)
Shadowheart - Life Domain Cleric (Player 1 companion)
Lotje - 8 Lvl Oath of Vengeance Paladin, 1 Lvl Bard (Player 2)
Gale - 8 Lvl Evocation School Wizard, 1 Lvl Tempest Domain Cleric (Player 2 companion)
The moment of epicness, or as Shadowheart put it: "S**t." And of course, I couldn’t leave out the cutest moment with Gale, as he’s my favorite of all, and this was a turning point for my paladin’s story. After this fight, I felt ready to let go of vengeance and to swear an Oath of Devotion: to stand by Gale’s side, to shield him from harm, and to find a way to deal with his… let’s call it a magical condition.
That Myrkul’s Presence was quite tricky. We wanted to push through without using heals, hoping Shadowheart’s healing ring and gloves might at least grant us some buffs. We ended up burning one of her heals testing that theory, but unfortunately, it didn’t work. In the end, we decided to play it safe, getting out of the aura and down from the platform to heal up before finishing him off.