Yeah I know - is it the only known way to prevent the blow up? Quote hisgenli
About Agiel, there is a way to kill him so htat he does not use his "blos up" ability as you call it. You just dont attack him^^. Take Wendigo or Abomination (LC) and Blacksmith with Impale Armor.
Ok, time to get the sheep... it's a pity the timers on last bosses after death are so fast. It would be nice to have a little breath to regroup