This looks like a really cool faction! I like how you have 4 different constructs that all do different things.
I wonder how strong they would be at scoring as they will need to keep all 4 constructs on the board in separate clearings to get their maximum points.
With the collector you're definitely incentivized to craft as many items as possible and it seems like they would be fairly good at crafting, although they need warriors to craft and might not draw enough mouse cards to have a strong board presence.
The use of mud tokens to build constructs and repair them is really cool!