^ This
Sword strap is always the superior choice unless it is breaking your x-hit.
Inside Abyssea, assuming you have Apoc Atma and A&O, I would stick with a standard 6-hit looking something like this:
Outside since you wont have such a high Ammount of TP overflow if you are using Twilight Scythe I would try to 5-Hit it. A 5-hit Twilight would look more like this:
If you start hitting into situations where ACC starts mattering your going to want to swap your gear around quite a bit, this would be a somewhat ideal high ACC build for a DRK using twilight scythe.
You would want to aim for a minimum of 5STP on E:body if you were to get one.
A 6-hit might be better for High ACC since you can dump some of the STP slots for more ACC but I havent bothered doing any math for it recently.
Edit:
Also Woeborn is superior to Twilight and much easier to build a 5-hit around, I highly recommend getting one.