I completed BG2 SoA and my battles with Irenicus were very memorable, the first battle with him at the Tree of Life was very tough and I died at least 5-6 times before I adopted a winning combat strategy that included
- Spells like Breach and Piece Magic to weaken his magic defenses
- Spells like Chaotic Commands and Death Ward to protect my party
- I used summoning spells like Mordenkainen's Sword to distract him
- I ran away when he used AOE spells like Ice Storm
- My fighters used potions like Fire Giant strength to enhance their combat effectiveness
And then in Hell I initially ran away so I could focus on his summoned monsters and then I changed into the Slayer to kill him, I very seldom use the Slayer and this was only the second time in the whole SoA I used that special ability
I am now playing ToB, my favorite RPG of all time, and Im in the Marching Mountains. I had some real issues initially with the first Bhaalspawn battle with Illasera, I was killed at least 5 times. I then reran the Ascension mod and removed all '' make Bhaalspawn fights harder " that include Illasera and Gromnir and the fight became reasonable and fun
I think there was a bug with my Ascension mod because the Illasera battle seemed almost impossible?