I'm posting screenshots of the creatures.
I like the battle mage more than the other options I've made.
The green manticores can stay as they are, but before I post them, let me know what color you'd like to see them (specify the skin color and mane color, keeping in mind that the new dark dwarves are colored like this: unupgraded - brown, first upgrade - dark purple, second upgrade - red, and the manticores are called catacomb manticores; they have very strong poison and acidic blood).
Here's what I suggest: make the alternate upgrade not red, but with a burgundy color scheme. I think the color of wine would suit the dwarves.
Ratores with burgundy elements - a pattern on the hammer, some kind of inserts. Grenadiers with burgundy jackets, give the brutes red pants - it will turn out to be quite funny and elegant. Well, for the swordsmen, make the sword hilts with a reddish tint, you can add tattoos or a dark burgundy shoulder pad. The mages clearly need a darker cloak, or better yet, replace it with a cape, which would suit a necromancer more. Make the manticores red with black manes - this will create a contrast and look nice. And you can also add burgundy elements to the ice giants.
The same goes for the first upgrade. Only they need to be colored in black and purple so that everything looks organic and pleasant.