Skul

Stratholme
From the main gate, clear the streets toward Festival Lane and Market Row without crossing the next arch during an existing pull. The Unforgiven ambush brings Vengeful Phantoms into the street. Check for Hearthsinger Forresten and Skul while travelling, but do not depend on either rare appearing. Ezra Grimm's tobacco box and the postboxes are deliberate side encounters; clear their surroundings before interacting.
Skul
Elite UndeadSkul's frost slows make a moving street pull risky while Frostbolt and Arcane Bolt continue damaging the target.
Abilities

Frost Armor
Frost Armor chills melee attackers. Settle the fight in cleared space instead of making slowed players chase Skul through the streets.

Frost Shock
Inflicts Frost damage to an enemy and reduces its movement speed for 8 seconds.
Frost Shock slows its victim. Let that player rejoin before moving into the next pack.

Frostbolt
Inflicts Frost damage to an enemy and reduces its movement speed for 4 seconds.
Interrupt Frostbolt to prevent both its damage and another movement slow.

Arcane Bolt
Hurls a magical bolt at an enemy, inflicting Arcane damage.
Use spare interrupts on Arcane Bolt after preserving an answer to Frostbolt.
Tank- Bring the rare into an already-cleared street and keep Skul there. Do not retreat through another pack while Frost Armor and Frost Shock prevent melee players from following promptly.
Healer- Keep the bolt target in sight and watch the player slowed by Frost Shock before the group moves. A stationary fight is safer than following Skul through successive street pulls.
Damage- Interrupt Frostbolt and use spare interrupts on Arcane Bolt. Favor a settled position for melee attacks because Frost Armor slows attackers who try to chase the caster.