The fourth column in mercenary towns.

Question: Why create a fourth column (additional alt) when most alts are poorly differentiated? Are you familiar with Occam's razor? Don't multiply entities beyond necessity. If you need diversity in alts, spread the creatures out, make more distinctions between them, different stats, abilities, etc. For example, there are Titans and Thunderbirds. Why do you need another alt when, in reality, there isn't even one good one? Another example: Demonesses and Temptresses, Royal and Battle Griffons, Assassins and Hunters – this is how you should differentiate alts, and that will provide the necessary diversity without adding 100-500 unnecessary upgrades that few people need.

Added 4 minutes later
Of course, everything above is just my IMHO. Project NCF, although it introduces many new entities into the game, does so where there is a real shortage – a lack of neutral creatures in the game. There is no shortage of alts in the game, but there is a shortage of their development.