RR and GH are essentially full time atma
If you find that you are almost always using saber dance, then use SS. If not, AoA is better. Since I'm a taru I like SS a little better to be honest.
When I solo I use Cloak and Dagger (too lazy to get siren shadow or even better dark depths..) This and x2 evasion kila +2 allow me to use DD gear while I fight and not worry about shadows at all. For some NMs you can do this without an evasion atma though.