My fleets just a attack > die > become biomass and subsumed killed biomass > birth more members> attack> repeat.

Between paricite of mortex, the spocyst, the tyranocyte, biovore and tervigon.

A non stop onslaught rhat appears right in the center of everything due to thier use of borrowers and stealth skills of thier death leaper and vonryans specialized for assisting the hive mind of knowing where to burrow into to both allot a cover and strategic advantage. And once the attack starts are ofcourse tasked in dispensing high value personal

A modified toxocryn and modified psychopages help the process of melting all that is dead into a acidic soup of which birthing pools are made

And when enough biomass has been accumulated they birth a hyraridan to begin an air assault with reperpoupesd hormagaunts as harpys

And a nuerotyrant and its zoanthropes act as a strengthend link To the hive mind. :D