I figured out the issue, the mobs become immortal after i use "long sword" or if they use their basic weapon "club" in this matter.
When i use "Sting" before using longsword or before they use their basic weapon, i am able to kill them.
But as the enemy uses the basic weapon at Max 2nd round, its over, cant pass the 3 mob fights.
Single mob fights will be just fine as you 1 shot them before they can act.
But currently the mod needs a fix other than GodMode.