You can use 7.2.0.Final arquillian containers that are avalbile in jboss.org maven repositories.
And what about 6.1.0.Beta ??
EAP 6.1.0 is based of 7.2.0.Final and you can use its artifacts to connect to it.
There are currently some efforts to move the AS7/WildFly arquillian related code outside for AS7/WildFly codebase so it will have its own release cycle.
It is not thighly bound to app server itself.
you could even use 7.1.1 version of, given that you upgrade xnio & remoting dependanices...
Ok Tomaz thanks