You can use sleep mist potion and enhaced lust potions. Raise his libido and then... you know ;).
Alpha gives a lot of exp, so grind some encounters and try to use the skill points on CON and AGI for future bosses. ¨Just enough for 200 hp or 1 critical dmg will smash you down always.
Be prepared with a lot of potions and you will be fine.
Then what about the two Minions he always summons? It's also quite annoying if they always give a bleeding debuff? I've tried dozens of times and still lose, this makes me want to stop playing :(
Edit: Well, I did as you suggested, but I used another method which is a bit wasteful, give sleeping potion and wolf poison periodically until the enemy's life is gone... At least this is the most effective way without the risk of getting hurt, lmao...
