azaroth
23
to have a thrall hit level 20 that need otherwise 5h of killing of monkey or skeleton is not an an enough reward in killing commander ? and if this commander drop thing to do heavy armor, is it an hazard ? and the 4 free bomb + the dragon powder that the commander can drop, and a deadly legendary katana in courtyard at each run no good ?
and yes difficulty is to make survive your thrall, which is doable as i trained 40 thralls with this event, and if there was no risk to have his thrall killed it will make this event too easy and unbalanced. Now that i discovered all secrets of this castle and invested the time needed for it, i can chain it and farm it in 10 mn now, training 2 thralls each 10mn. so i am not sure this is a good idea to give more loot than the 2 vaults full of bombs that i already have 
and gold coins are very usefull for doing purge
and present later your cornag or sonja to the hand of war to hit level 20