All Auto, 2x speed.
My Warrior GS is maxed on ATK...all 6 Strength Talismans. He and the Wickerman are fully skill-sharded.
If the AI plays the skills properly and uses the Wickerman's Power skill at the right times, then I am at the lower end of the time scale (32-34 secs).
That being said, I love your AoF trooper, Arcturus...he can nearly single-handedly wipe out the boss on Powerslave Madness. I farm that level the most to get through all my troopers quickly with the least amount of SoT and the most return in Gold and XP.