Divinity: Original Sin Enhanced Edition

"Valiant". Boss King Brakk.
This battle will have to be divided into two parts.
Battle tactics. After the save occurs in front of him, take all the characters to the steps where you removed the protective field. For all characters, set the “Escape” skill to the quick access panel. After that, equip all characters with wands with water damage. Then you select the main character who has the highest health and separate him from the main group. Next, use this character to run to Brakk and talk to him. After talking with Brakk, the battle will begin.
Note. If for the main characters you made independent armor with protection from the four elements, then the character will survive after the turn of Brakk and the ghoul. To understand what I'm talking about, look at my hint for the "Please Don't Die" trophy.
After it is your turn, go with this character to the main group and wait for the Ghoul, Monterik and the Fire Twins to pass through the door. Brakk himself will not come to you yet. Your first priority is to destroy the Fire Twins with the wands. Then switch to your main weapon and focus on the Ghoul. He is vulnerable to air damage, so use stun arrows on him. Next is Monterique. Try to put “Divine Light” on it and knock it down, or use the “Crippling Blow” skill. Attention! After all three are dealt with, immediately use the Escape skill. This must be done to remove the Void Auras that give Brakk invulnerability.
You will find yourself at the Altar of Wanderings “Sysil: Grove”, near which you will heal (I recommend using food, as it will be faster) and then through the same Altar to the Altar “Sysil: Old Church” and run to Brakk. In front of him, save again and run up to him without fear.
Brakk will make two hits on one of the main characters, but the armor will save you. Your task is to cast “Divine Light” on him and then knock him down. Brakk is vulnerable to water damage, so use water arrows or wands with water damage on him. Summon Nick's help to cast Disease on Brakk. Use perception potions for everyone to increase your critical hit chance and don’t forget to lower Brakka’s armor with a silver arrow.

Kill King Brakk under the church (main quest, don’t miss it) in Saysila and go to the Village (sitting at the table next to the barracks) and tell her everything you learned about the invasion. She thanks you and the trophy is yours.