[HoMM V]9 Race - Swamp! Is it needed?

Once again, all creatures from the Swamp Fort, along with their upgrades!
Level 1 - Troglodyte (attacks with a spear, magic resistance (Blindness))!
Level 1 upgraded - Swamp Troglodyte (attacks with a spear, magic resistance (Blindness, Slow))!
Level 1 upgrade - Hell Troglodyte (attacks with a spear, 1 fiery spear attack, magic resistance (Blindness, Unholy Word))!
Level 2 - Lizard Archer (archer)!
Level 2 upgraded - Lizard Sharpshooter (archer, poison shot)!
Level 2 upgrade - Lizard Master (archer, shot that reduces movement range by 2 (only once per creature))!
Level 3 - Gnoll (attacks with a mace, stunning attack 30%)!
Level 3 upgraded - Gnoll Marauder (attacks with a mace, stunning attack 40%, double strike)!
Level 3 upgrade - Gnoll Captain (attacks with two swords, triple strike)!
Level 4 - Flying Serpent (large creature, flying)!
Level 4 upgraded - Three-Headed Serpent (large creature, flying, weakening attack 30%, attacks all creatures in front of it)!
Level 4 upgrade - Dragon Serpent (large creature, flying, weakening attack 40%, dragon's acid breath)!
Level 5 - Gorgon (large creature)!
Level 5 upgraded - Mighty Gorgon (large creature, fear)!
Level 5 upgrade - Ancient Gorgon (large creature, breath of death 35%)!
Level 6 - Medusa (archer, freezes nearby creatures 30%)!
Level 6 upgraded - Medusa Witch (archer, spellcaster (Slow, Ice Block spells), freezes nearby creatures 40%)!
Level 6 upgrade - Supreme Medusa (archer, direct shot passes through all creatures in its path, -2 to creature's movement range (only reduces once), freezes nearby creatures 45%)!
Level 7 - Basilisk (large creature, can climb over castle walls, freezes with its gaze nearby 50%)!
Level 7 upgraded - Plague Basilisk (large creature, can climb over castle walls, freezes with its gaze nearby 55%, plague bite 50% (Plague spell))!
Level 7 upgraded - Ancient Basilisk (large creature, can climb over castle walls, freezes with its gaze nearby 60%, casts "Weakness" and "Debilitate" spells)!
What do you think? :)