Wil, I don't think there's a 'Skype for business' specific how-to/best practices guide.
The VoIP guide should be sufficient for the voice side of Skype though.
If the Windows Skype clients are getting GPOs to configure the client with DSCP values, then the priority values are taken care on the client's side. From there, you just need to ensure that the AP-to-switch QoS mappings are matching and correct.
The good news is that even if they aren't matching, WiNG provides the ability to re-map CoS/DSCP to whatever you want.
Here's the https://about:blank
Refer to pages 4-5 specifically for recommended setup concerning QoS and WiFI related material.
If you follow these settings, the Voice and Video queues will match the WiNG QoS mappings.
Here's the default WiNG mappings:
Wireless Queue CoS Access Category
Q1 7,6 WMM Voice Priority
Q2 5,4 WMM Video Priority
Q3 0,3 WMM Best Effort Priority
Q4 2,1 WMM Background Priority
802.1p CoS From DSCP Range
0 0-7
1 8-15
2 16-23
3 25, 27-31
4 24, 26, 32-39
5 40-45, 47
6 46, 48-55
7 56-63
