OK, all the bosses I mentioned in the post above are OK, it's a challenge for normal players and SHOULDN'T BE EDITED except for people who think the campaign is so hard (in easy mode). Ah, I forgot.. remade Wildboar Chief in chapter 2 (the boss who place 2 Healing wards very offen...), he's a BUG.
All other bosses who prefer to brute strength and have weak spells are easy to defeat, so they are OK in Easy Mode. In normal mode or above, you can make them stronger in 2 ways: first, focus on DPS, add to them some kombat king (like stun, feedback, crit, armor reduce, miss, counter attack...), they should be crazy DPS dealer in this way; second, fasten their casting time, example: the Orge King in chapter 1, Meiepuliev (>"<) , some disable skills (hex, stun, imbolize, freeze..), make summons stronger and fast regen.
One more thing: becareful with summons, since there are many items that restore after kill, you must made sure that summons are hard to kill (or your summons will like a heath-and-mana-source).
List bosses should be made stronger in normal mode:
Chapter 1:
-Orge King: cast time faster, regen faster, higher armor.
-Bandit King: nothing special, just like a creep, turn him into a deadly rogue (chaos damage, armor reduce, avatar...)
-Wuzzes Magician (not remember his name, he appears near Phodom house): his Illusions are way too weak, he don't use Illusions at the beginning, he use when he nearly dead >"<, make his illusions take 100% damage and deal 50% damage, and add a smoke skill (like Steath assassin in dota).
-Ancient (in the place you dig for kombat king): give him more hitpoint and taunt faster, summons more and faster (he tank, and his creep kill).
-Main Boss: health and mana regen reduce aura, damage Phodom every time he cast a spell.
Chapter 2:
I pass this chapter almost by Invisibility, so I can't imagine how to improve bosses in this chapter... maybe fast regen or counter attack or... TRUE SIGHT! But anyway, it just take more time.. not more live..
Chapter 3:
-Elite Boss: I don't know why but... he's hexed very offen (maybe because of my kombat king, I play from give up), so I kill him without losing a potion in
**** mode, he in the Alpha version is stronger!
-Main Boss: make her summons harder to kill, and her DPS should be a little highter.
Chapter 4:
-Elite Boss: Snake Ward should have more hitpoint.
-Main Boss: more feedback damage, and maybe disable skills.
Chapter 5:
-Element Earth: more AS, more summons, and let him fight together with his summons.
-Main Boss: Illusions, Resurrection, Crit and Evasion.
Chapter 6:
-Death Bringer: more spell range, DO NOT let players get outside or this boss's spell mean.. nothing, summons RANGERS instead of meleer and place them far away from Phodom or Fradz.
-Mister Skeletal: INCREASE HIS LEVEL TO AT LEAST 51, WHY? the main idea about this quest is 2 bosses together in a small place, if one boss can easily killed just by one spell (FRADZ'S DARK RITUAL) then... this quest is nothing special.
-Sorry but this chapter has so many bosses, I can't remember all >"<, I will update later..