I have just started IWD2 after I played it about 10 years ago, great game!
I have read a lot of posts about how HoF mode is impossible to do solo with a fresh level 1 character.
I have been able to do it tonight! sorta...
I did it with a sorcerer and using summonings. The first goblin at the top left is just about killable with 4 summoned monsters, it takes a bit of luck to get just enough damage to kill him before your monsters disappear.
You then get to level up due to the insane amount of XP you get and your on your way to being able to solo everything, just keep getting summoning spells.
Kill all goblins outside as they are the easiest to do and you'll get your level up.
The house with the cats in is easy as the goblins are distracted by the cats, rush in, summon monsters, easy.
The warehouse is a little more tricky, I did it by casting mirror image, rush in and cast a monster or two, then cast invisibility. MI buys you time to get your monsters up and to vanish. You can then cast more monsters once the goblins are focused on your first monsters.
Once your able to cast raise dead you get greater bone guards which slice n dice everything, add to that haste, cats grace and bull strength you have yourself a goblin blender
I'm about to move out of Targos now, my lone sorcerer is level 16, I'll keep you updated if people take an interest in this post!