Idea.
Let's be a bit intimidating, shall we? It'll help with the surveyor as well. And if he doesn't listen, well that's what the army's for.
Gather all of our Stems together in a line, wielding weapons. We have 101 now, right? Then have 51 off them wield the Spears, and the rest holding bows, or something at least, to propel our 'poisoned' arrows. Gather our Fungus Spawn towards the area in a semicircle to slowly force the knights towards our soldiers. Firejackets will cover the sky, a veritable ceiling of flame above their heads. And our drakes, Tiberius, and Laksus will take up positions around our lines. Then, speak through Laksus and Tiberius(asking their permission mentally a few seconds before, of course), and all of the Stems, creating the same discordant yet melodic voice as we used last time.
"Ah, the Justicars of the Empire of Tranquility. These people are under my protection now, the protection of the god Donut. I'd prefer not to completely mutilate you and your horses, but your steel would look so fine on another one of my followers. So let me ask you. Do the few of you truly wish to fight a god? Over a few people whose only crime is having a power you cannot control?"
Then, demonstrate some of our strength. Tiberius lets out a gout of flame towards the sky, the drakes do the same, and Laksus becomes a beast, all at the same time. He returns to normal afterwards, but we need to make a point that this is Chaos. Organized Chaos. And we don't take shit from nobody.