War horn
Sound a war horn to rally your forces, increasing Max Magicka, Health, and Stamina for you and your allies by 10% for 30 seconds.
You and your allies also gain Major Force, increasing your Critical Strike damage by 30% for 8 seconds.
Critical Strikes do more damage
Storm Atronach
Summon a greater storm atronach at the target location. The atronach’s arrival deals [x] Shock Damage and stuns nearby enemies for 3 seconds. The atronach cannot move but attacks the nearest enemy for 15% more damage.
An ally can activate Charged Lighting, giving both the ally and the atronach
Major Berserk, increasing their damage by 25% for 8 seconds.
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So I am sitting here thinking war horn or Greater Storm Atronach? Here's some my thoughts on the matter. In random dugeons when dps is slow or underpeforming than a damage ulimtiate is a better choice or a debuff/ buff ultimate. The same goes for if one dps is of significantly higher magnitude either dps could use it and have a higher benefit. Then again dps about average than this would be best choice here.
Warhorn is good when everyone knows what they are doing while having enough champion points to get maximum benefit from it. As such upper level dps would benefit for extra 10% in resources along with major force while taking less benefit from say barrier, nova, storm attonach, mamga amour. At least those are my thoughts on the matter. What say you?