I use flayer *a lot* when I run. I find it's ability to grab fleeing freeps to be invaluable when in a group situation. If I'm running solo or in a pack, I'm in shadow a lot more often. IMO, it makes sense to still have shadow damage traited. My testing has generally found damage is better with shadow than common damage even with the tact mit changes.
I'm trying out Mr Warg's suggested build. Will let you know what I think
[url=http://www.sigcreator.com/][img]http://www.sigcreator.com/generatedsigs/722012873lotro_lotro31.png[/img][/url]
Freeps: 85 mini - Adnia, 85 LM - Sariela
Creeps: Baldardash (WL), Rigmarole (warg)