nUI does have a working raid sort... buy it isn't obvious because of the way the nUI5 unit frames are organized. nUI6 makes it more obvious. See the slash command docs here...
http://www.wowinterface.com/forums/s...ad.php?t=21199
/nui raidsort {unit|group|class|name}
Selects the sort order used to display unit frames while in a raid. The 'unit' option sorts unit frames by the unit ID from raid1 to raid40. The 'group' option sorts unit frames by the raid group number and the 'class' option sorts by the player class and the name options sorts the raid by the player's name. The default is to sort unit frames by the raid group.