[Tactician] Divinity: Original Sin 2 Contaminated Horror - Explosive Traps 18K Damage

The Contaminated Horror is not the hardest fight but it has almost 15K HP with strong resistance on almost all elements and physical. You're supposed to take out the little guys to make it a bit weaker, but why bother if you have explosive traps!
In 06:43, you'll see with 10x explosive traps, it'll do 11K damage to Contaminated Horror that has 40% fire resist (or 18K with 0% fire resist). With 3K hp left you'll just need another party member to finish it off.
The video also showcases how powerful teleport can be. With the right build, you can see Lohse (00:15) teleports 4 enemies in one round to cluster them all up for the explosion. The last thing to complement the build is Torturer+Entangle combo (02:40). Put that on the enemy cluster and they can do nothing but wail while you nuke them down.