We're getting reports of users disconnecting from Citrix and I'm not sure if it's Wi-Fi/LAN/WAN yet. As you said, I want to consider tagging to fix it, but am concerned about the tradeoff of affecting Lync. Maybe I'll start with a lower ToS value, after I do some more digging into LAN/WAN side.
Aside from the default citrix ACL, I can't find any documentation, best practices, etc for deploying Citrix over wi-fi, let alone in a VoIP environment.