I see what you did there 
We’ll put Arachnaean Weaver in the Soulforge for everyone to craft by way of a compromise. Probably next week.
We’re just figuring out how low we can get the cost and still keep it sane.
We actually would have loved to put a Yvendra → Weaver exchange in the Soulforge… that was a good idea, BUT as we know, we modified the forge based on player feedback so it didn’t consume troops used in recipes, so we weren’t able to do that.