Q:
need help on legendery
First of all: If you’re wanting a specific weapon type from the forge, don’t use a Mystic Forge Stone. Tossing in three staves and a forge stone is the same as tossing in three staves and a sword (or any other weapon); your result will be one of any possible weapon rather than only a staff.
As for your question, I’d think about it in terms of how much use your weapon will get. Legendaries (like Ascended gear) are account bound and can be passed between all of your characters. So if you play several classes that use greatsword, and if you use that weapon on those classes often, then go with Twilight. If your characters use staff more often than greatsword, then go with the staff.
most of my charters use staff but ithink twighlight is pretter