For posterity, this is what worked in the end:
META-INF/jboss-deployment-structure.xml
<jboss-deployment-structure>
<deployment name="something.war">
<child-first>false</child-first>
</deployment>
</jboss-deployment-structure>
Which I guess equates to what I was doing before.
Thanks for the tip!
:DeN
--
Theory helps us to bear our ignorance of facts.
George Santayana