I could be wrong, but it seems to me what you're really trying to say is
something like this, no?

Hey, Serenwilde, even though it's anathema to your commune's purpose,
let's make a deal. We're really tired of guys like Narsrim and Tuek
being so damn good at what they do, and we'd really prefer to get back
to doing what we do best, which is massively slaughtering anything
remotely Celestian completely unhindered. Wouldn't it be so much easier
if we could all just get along until all of them are dead and we've made
zombie slaves of your alchemists? Oh, and keep sending us your
disgruntled rogues, we need more spores and stuff. *cough*

It sure sounds like that to me...

Yours truly,
-Galvadore

Penned by my hand on the 16th of Vestian, in the year 113 CE.