Hello Dievoit here. I wanted to post the recipe I found for Mystic type weapons. If you are looking for endgame weapons that are fairly easy to obtain with the Mystic skin here is how.
You need: 30 Mystic Coins. these are obtained by doing daily missions and with zone completion
1 Eldritch Scroll this cost 50 skill points and can be bought from the mystic forge vendor
10 top tier components per example; If your making a Focus you need
5 Ancient Focus Cores (400 Artificer)
5 Ancient Focus Casing (400 Artificer)
if your making a Short Bow you need
5 Ancient Short-Bow Staves (400 Huntsmen)
5 Hardened String (400 Huntsmen)
These weapons are end-game raid ready weapons and minus your legendary carry the same stats as top tier exotics. In addition they all have really jazzy effects. Both my Short Bow and Pistol on my thief have electricity pulsing through them. They also carry the same runes as the Legendarys from what I have seen so far with the few I have made. Enjoy and good luck getting some of those end-game pieces.