Oh that's good to know, nothing is harder than HoF then. I never really got into it because getting +5 weapons from goblins seemed very dumb, but maybe I'll try it
Icewind Dale 2's Heart of Fury mode was dumb. Really dumb.
I suppose the idea was to create some sort of New Game+, where you brought in your original party and played through a scaled-up version of the campaign. The problem is, it scaled terribly. Warrior classes, especially "pure" characters, become practically obsolete in the face of hyper-powered melee enemies. Even Throne of Bhaal didn't kneecap them this badly. To make matters worse for the more mundane classes, monsters that mages could summon had all the beefiness of their HoF counterparts. And since HoF mode was typically played with a carryover party, that's right, you were summoning high level monsters/undead. The game felt like Pokemon: Forgotten Realms Version. "Cold Bones, I choose you!"
All you really get is a ton of increased stats and some powerful magic weapons (that still don't make your Fighters very useful).
Just another example of "lol, Black-Isle/Obsidian combat!"