A guide on when it is wise to pop heroism.
Icecrown Citadel
- Lord Marrowgar - As soon as the tank has positioned the boss on the initial pull.
- Lady Deathwhisper - At the beginning of Phase 2.
- Icecrown Gunship - Don't bother. Save it for Saurfang.
- Deathbringer Saurfang - As soon as the tank has positioned the boss on the initial pull.
- Festergut - After Festergut's 4th cast of Vile Gas (the debuff that is placed on 3 ranged at once).
- Rotface - As soon as the tank has positioned the boss on the initial pull.
- Professor Putricide - At the beginning of Phase 3.
- The Blood Princes - As soon as the tank has positioned the boss on the initial pull.
- Blood Queen Lana'thel - As soon as there are 8 vampires on 10-man, or 16 vampires on 25-man.
- Valithria Dreamwalker
- With 1 shaman, after the 5:00 mark when the healer is out of the portal.
- With 2 shaman, after at the 4:20 mark when the healers are in the portal, and after the 5:00 mark when the healers are out of the portal.
- Sindragosa - At the beginning of Phase 3.
- The Lich King - As soon as the tank has positioned the boss on the initial pull. It is possible heroism will come off cooldown during the fight, if so wait for Phase 3.
Onyxia's Lair
- Onyxia - In phase 1, between 75 and 80 percent. Heroism will last long enough to burn her while she is transitioning into phase 2.
Crusaders' Coliseum
- Northrend Beasts - In phase 3 once Icehowl has crashed into the wall and is stunned.
- Lord Jaraxxus
- Normal - As soon as the tank has positioned the boss on the initial pull.
- Heroic - Use heroism at the 2nd portal. The 1st and 3rd portals should be taken down by the raid using cooldowns and trinkets.
- Faction Champions - Immediately.
- Twin Val'kyr - After the 3rd special ability.
- Anub'arak - At the beginning of phase 3.
Ulduar
- Ignis the Furnace Master - As soon as the tank has positioned the boss on the initial pull.
- Razorscale - The first time the dragon lands, use heroism.
- XT-002 Deconstructor
- Normal - As soon as the tank has positioned the boss on the initial pull.
- Hard Mode - At the beginning of the first heart phase.
- The Iron Council
- Normal - As soon as the tanks have positioned the bosses on the initial pull.
- Hard Mode - After the 2nd boss dies.
- Kologarn - Immediately.
- Auriaya - As soon as the tanks have positioned Auriaya and her cats on the initial pull.
- Hodir - As soon as the first mobs are freed.
- Thorim - At the beginning of phase 3.
- Freya - At the beginning of phase 2.
- Mimiron - At the beginning of phase 4.
- General Vezax - As soon as the tank has positioned the boss on the initial pull.
- Yogg-Saron - At the beginning of phase 3.
Eye of Eternity
- Malygos - Once two energy fields are placed on top of each other, use heroism.
Naxxramas
- Anub'rekhan - As soon as the tank has positioned the boss on the initial pull.
- Grand Widow Faerlina - As soon as the tank has positioned the boss on the initial pull.
- Maexxna - At 30%.
- Noth the Plaguebringer - As soon as the tank has positioned the boss on the initial pull.
- Heigan the Unclean - As soon as the tank has positioned the boss on the initial pull.
- Loatheb - As soon as the tank has positioned the boss on the initial pull.
- Patchwerk - As soon as the tank has positioned the boss on the initial pull.
- Grobbulus - As soon as the tank has positioned the boss on the initial pull.
- Gluth - As soon as the tank has positioned the boss on the initial pull.
- Thaddius - As soon as the tank has positioned the boss at the beginning of phase 2.
- Instructor Razuvious - As soon as the tank has positioned the boss on the initial pull.
- Gothik the Harvester - At the beginning of phase 2.
- The Four Horsemen - As soon as the tanks have positioned the bosses on the initial pull.
- Sapphiron - As soon as the tank has positioned the boss on the initial pull.
- Kel'Thuzad - At the beginning of phase 3.
Obsidian Sanctum
- Sartharion
- With no drakes - As soon as the tank has positioned the boss on the initial pull.
- With one drake - Once the first drake lands.
- With two drakes - Once the second drake lands.
- With three drakes - Once the second drake lands.
- Burn method - At 40 seconds into the fight.