Single-Player - No Mods
No changes to default setting except decrease thrall crafting speed.
Armor: Standard Royal Armor
Weapon: Iron Trucheon with Simple Blunted Weapon Kit
Hunting Ground: Sepermeru
T1 & T2 - Knocked out in one hit
T3 - Knocked out in one to two hits
T4 - Knocked out in about three or four hits
I even knocked out Enika of Cimmeria in two hits. Granted she is weak for a named fighter, but it should be more difficult.
I am not sure if this is intentional, but it takes the fun out of thrall hunting. This is way too easy.