Context: Daedric Prey curse applies 55% increased damage to caster's Summoned being damage. Familiar Damage Pulse is newly (as of 2.7.0) able to be increased by this buff.
Observations: Non-updated Familiar mechanics behave as expected in the presence of Daedric Prey: Only the caster's own Prey increases the damage of summons owned by said caster. Tested skills with this behavior: Greater Storm Atronach, Twilight Matriarch, Twilight Tormentor, Volatile Familiar Melee.
Updated Familiar Damage Pulse incorrectly allows multiple players to boost output damage.
Single-Prey-caster parse: Max Familiar damage 19,408

Multiple-Prey-caster parse: Max Familiar damage 25,957. Identical gearing and rotation.

Single-Prey-caster parse: Max familiar damage 25,711. Raid buffs used. Overall damage increased 30%

So, with only two players you can boost this skill by as much as Warhorn, Combat Prayer, and Guard for the duration would grant. What about with four Daedric Prey casters? Eight? Twelve? More? Damage vs. Player targets was not tested, but is highly relevant. If this behavior works in Cyrodiil and reaches Live, a lone scamp and a few tenders will be able to one-shot whatever player they please.
Needless to say, this would alter class balance and leaderboard times in PvE detrimentally as well.
Hoped-for fix: Correction of Familiar Damage Pulse to standard behavior; owner's curse may buff it, but no others.
Alternate hoped-for: Others may cast Prey for your benefit, but no stacking allowed. Ideal situation for group play.
Edited by Erasure on February 7, 2017 6:11AM