I haven't looked at the previous pages, so sorry if I'm repeating myself, but IMO, alternative upgrades should maintain the stability of creatures or compensate for it, but not be so much stronger.
Level 1 improved - Swamp Troglodyte (attacks with a spear, magic resistance (Blindness, Slow))!
Level 1 upgrade - Hell Troglodyte (attacks with a spear, 1 fire spear attack, magic resistance (Blindness, Unholy Word))!
Level 2 - Lizard Archer (archer)!
Level 2 improved - Lizard Sharpshooter (archer, poison shot)!
Level 2 upgrade - Lizard Master (archer, shot that reduces movement range by 2 (only once per creature))!
Level 3 upgrade - Gnoll Captain (attacks with two swords, triple strike)!
Level 5 upgrade - Ancient Gorgon (large creature, death breath 35%)!
I changed what I wanted and slightly weakened the alternative upgrades!:)
