[Final Edit: Ignore This Post. I misread the indicated spell. Luckily that has only ever happened to me. ]
Per turn? I’ve never known a mercenary task to be per turn. It’s always total damage. What exactly is the task?
Task 9: Strong Shadow Damage: Deal 30 or more damage in one turn using Shadow Surge 15 times (the dreaded “15 times”).
It was totally easy task one use per turn its one start… But you never saw hard quests
Example : Gruul Task 9 or 10 i dont remember …
Destroy 45 enemies with Dragonmaw Poachers
You just going in the last 7 bounties in blackrock mountains to run it against dragons