The reskin of the Royal Arbalests turned out great.
But the ones with bows are too similar to the alternate upgrade of the second tier.
In general, the game has established a certain color coding. It is especially noticeable on the units of the Order faction.
The base color is blue, the upgrade is gold with white, and the alternate upgrade is red with gold. Ideally, if you create a new level of upgrades, you need to continue the color coding in some way. To help the player navigate.
The only problem is that there aren't many bright colors left. Yellow, green, and purple would look strange on the creatures of the Order faction. You could try black with gold, but that's just one option. In general, we need to think about something.
I didn't plan to create them all, from Tier 1 to Tier 7.
Just, I liked some of them, and I've wanted to do it for a long time. I also want to split the Tier 6 Rampart units into Ents and Dendroids and then create their 3rd upgrades.
I was thinking about making a vampire with a single unit that has an attack and return ability (most likely red, as even from the forum, it's clear that people are not very happy with the beta red vampires xD).
And I would like to see Pegasi from the third tier =)