Как бы не должен. Урон должен быть увеличен с невидимости, 1й удар, а 25 ярдов это граница тп.
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https://wow.gamepedia.com/Shadowstrike_(rogue_ability)
Patch 7.2.5 (2017-06-13):
Shadowstrike now hits at melee range (was a 15 yard range) and generates 2 combo points (was 1).
Shadowstrike, when used while Stealthed, now deals 25% increased damage (was 9%) and teleports you up to 25 yards behind your target. This does not happen while in [Shadow Dance] or during [Subterfuge].