Sethallia — guide

In short

Sethallia is a Legendary Magic Support from Banner Lords built around one massive heal: 75% of the target's MAX HP with Block Debuffs, a full debuff cleanse once the skill is upgraded at 3★, and an AoE buff strip with turn-meter swing. She shines in Arena, Hydra, Doom Tower and Banner Lords Faction Wars; dungeons and Hard content are only average for her. Build priority: Speed, then Accuracy, then survivability.

Strengths

• A 75% MAX HP heal that saves even HP-stacked tanks; overheal turns into a team buff: +50% ATK, +60% DEF, +30% SPD or Revive.
• At 3★ Generosity removes all debuffs from the ally first and then heals; if that ally ends up at full HP, the rest of the team is healed for 20% MAX HP and gains 15% turn meter.
• Third skill: 75% chance to strip every buff from all enemies, then -10% enemy / +10% team turn meter, upgraded to -20% / +20% when 5 or more buffs are removed.
• Aura gives Magic allies +50 Resistance in all battles — useful in Arena and Faction Wars alike.
• Ratings: 4.5/5 in Faction Wars, 4.0 in both Arenas, Hydra and Doom Tower.

Weaknesses

• Thin base stats: 108 SPD, 18 000 HP, 1 354 DEF — she dies early without gear.
• Hard content sits at 2.0; she does not bring enough durability or utility there.
• Clan Boss is 3.0 — her role against a boss is limited.
• The buff strip is only a 75% chance and is Accuracy-checked, so low ACC makes it whiff.

Where to use

Start with Tag Team and Classic Arena (4.0): strip, turn-meter swing and a heal under control is exactly what those fights need. Then Banner Lords Faction Wars (4.5), where she is one of the best supports available, plus Hydra (4.0) and Doom Tower (4.0). Spider's Den and Sorath are also on her list even though dungeons overall rate 3.0. Clan Boss and Chimera are 3.0, and on Hard (2.0) do not count on her.

Stats and gear

Priority: Speed, then Accuracy, then HP/DEF. Rough targets: 250+ SPD for Arena and Doom Tower (more is always better), 350+ ACC for high-end stripping, everything else into HP and DEF. Crit Rate and Crit Damage are wasted on her — she brings no damage.

Sets: Speed, Divine Speed, Perception, Accuracy. Relics: Journal of Necrotos, Wand of Submission, Gilded Pinion.

Masteries and blessings

Go Support plus Defense trees. Key picks: Invigorated, Critical Bolster, Speedy Willpower, Gathering Momentum, Necrodefense. Blessings: Brimstone for extra damage and utility, or Temporal Chains for turn-meter control.

Tomes

Book Generosity first: it gains -1 cooldown and +10% healing, and it is the core of her kit. Next the third skill for its -1 cooldown and more reliable stripping. Incinerate last — it only adds HP Burn chance and damage.

Verdict

The site author says level her up: a top legendary, and books are worth dumping into her. Give her Speed and Accuracy and she will carry your team in Arena, Hydra and Faction Wars.