Castle Thorn Trifecta

For U47, by @sacr3dbac0n/The Frying Pan

General Checklist

Strats adjusted according to the typical setups we use everywhere. See pinned ⁠dd, ⁠tank, ⁠healer for details.

Resolving Vigor.

Preliminary

This dungeon is easy since you can go three DDs up to the last boss, but bring a self-heal. Or not, it doesn’t matter until Lady Thorn.

Do checklists as indicated.

Dread Tindulra

Avoid AoEs, but the dog should be dead before they explode. Drop all ults.

Blood Twilight

Stack and burn, ults if you have them.

Trash (en route to Vaduroth)

Exploding Imps appear from here; stand back during trash (best) or dodge out (bad). If your too late on the dodge and land after the explosion, you’ll still die. So just stand back.

Vaduroth

Kill the boss. After Scythe, spread and block.

Taunt Cleaver when he spawns.

Trash (en route to Talfyg)

Some Exploding Imps.

Talfyg

Stack and burn.

Trash (en route to Lady Thorn)

More Exploding Imps, just stand back.

Lady Thorn

Checklist

Spec back to healer.
Resolving Vigor on DDs.
Must have Expert Evasion.
Slippery if needed.

Overall, the fight is almost identical to Vet, except in the second (last) Batswarm phase, Lady Thorn comes down. Instead, you have to execute her during the Batswarm. Incursion and Bombs occur during this, so be careful and dodge as they come up. On HM, the bombs can be more deadly too.

Drop ults immediately or wait until after the first Scatter > Convergence > and/or Incursion. After Scatter, wait until Convergence to go back to boss or else you’ll get exploded from Lady Thorn’s landing. After that, she won’t do Incursion unless outside the range threshold.

Batswarm happens at 60% and 20%. Do the same ults between thresholds 60% and 20%. Save ults for execute outside those conditions (or <40% – 30%).

To summarize, here’s the encounter flow:
> Pull – Drop ults or save for after Convergence.
> Bat Swarm tutorial – Stay in green safe AoE. Dodge Bombs if needed.
> Scatter – Get out, stay at range.
> Convergence – Get away from Converging AoEs – Lady Thorn lands here, indicated by AoE.
> Incursion – Only happens if a player is too far from her.
> Push Batswarm (60%) – Get in safe AoE. Synergize 4x on dead Scamps, taunt and kill Blood Knight.
> Repeat from Scatter to Convergence 1x
> Push Batswarm (20%) – Synergize 4x, taunt Blood Knights.
> Execute Boss – Lady Thorn comes down. Drop ults.

Remember to dodge Bombs constantly throughout the fight.

Image credits and licensing

“Castle Thorn” © UESP, incorporating game components © ZeniMax Online Studios. Original image, used under CC BY-SA 2.5. Cropped/resized where applicable.

“Dread Tindulra” © UESP, incorporating game components © ZeniMax Online Studios. Original image, used under CC BY-SA 2.5. Cropped/resized where applicable.

“Blood Twilight” © UESP, incorporating game components © ZeniMax Online Studios. Original image, used under CC BY-SA 2.5. Cropped/resized where applicable.

“Vaduroth 03” © UESP, incorporating game components © ZeniMax Online Studios. Original image, used under CC BY-SA 2.5. Cropped/resized where applicable.

“Talfyg 02” © UESP, incorporating game components © ZeniMax Online Studios. Original image, used under CC BY-SA 2.5. Cropped/resized where applicable.

“Lady Thorn” © UESP, incorporating game components © ZeniMax Online Studios. Original image, used under CC BY-SA 2.5. Cropped/resized where applicable.