It will take too much time for me to make a full, detailed guide about mystic. And for some reason that line xthxbai irritates me. But he probably needs 78 guide for PT spam, so here's what to work on :
1. Make your cape/acc all evasion based, having a high amount of evasion in wolf helps you when fighting bosses (or when aping)
2. Get bloodthirsty prefix on weapon and relic, mystic lacks good drain weapon (except at 85) so bloodthirsty is your best friend
3. Demo buff is needed for last boss Queen, and Proph buff offers good firepower as well
4. Make sure you are using 75 pvp set, best stone for it is not 9 str 2 vit one. It is the 6 vit 1 evade (essentially 7 agi-ish for 1 evade)
5. Relic is obviously the lvl 70 one, while weapon is 75 1h hammer and 65 hammer (to make boss misses), sleep hammer dps is not so different compared to 65 hammer anyway
6. Max every talent that you can max
Gl.