Dragon- good idea but can we actually house a race full of these reptiles, let alone supply food. Here is a good idea perhaps it's blood or saliva can have some really strong alchemical properties.
Recon flyer- a bird that can sustain long-term flight via the sun, it also has the ability to bend light around it causing it to be rendered invisible, maybe it can also be have a understanding of language.
Firejacket Queen- provides autonomy for firejackets, and also produce queen jelly which has a lot more potent healing properties.
Improved Plant Soldiers- morph their arms into different weapons and shields, also maybe add hive mind with also the capability of individual decisions.
Didn't we tell the guy with the plant boom to make some heavier versions of plant soldiers.
How about this
Dragon: Simple, the good ol' fire-breathing, scaled engines of destruction we know and love. As for their food supply, we can either let them roam free to hunt their own food, or we can feed them the meat-watermelons.
Gourd Trees: Shoot spore shells that explode on impact, or can be set to explode in the air to disperse spores and shrapnel. The spores will also turn living things it touches into Fungus Spawn (excluding our followers of course). Can be manually controlled by a person with a life boon.
Fungus Spawn: Given new resin carapace as armor, resin can be collected while fluid and stored for fuel or the solid resin can be used to make bombs. Either way, the solid carapace is highly explosive, allowing the dragons to explode any dead Fungi Spawn that have fallen in a last ditch effort to stop sieges. Can be controlled through the Gourd Trees, but remain an autonomy not unlike a dog when not controlled.
Firejackets: They already have a hive mind so we dont need to touch them.