+2 > Twilight > Viking hat if only targeting one mob
Twilight > Viking hat > +2 if targeting a group since iirc DA can only hit the main mob (Although this may just be when using Warrior's Charge, in which case +2 is probably always better)

for legs +2 are better than teutates I'd say, because in my experience FC doesn't get an accuracy boost. Of course Hachiryu Haidate are optimal, and the WS DMG+2 trophy pants might even beat that if you're using VV (which you should unless you can keep up Mighty Strikes, in which case use Sanguine Scythe. It's not particularly hard to keep up Mighty Strikes either when Azure and Pearl is capped). Mighty Strikes does make FC crit, like all WS.