I got one mystic gem from GGC crystal and used it for Doom. After completing act 7 I got another mystic. Don't know which mystic even needs it. IMO Doom is the best option. Can steal power gain buffs and re-apply shock debuffs. And prestige.
In 6* mystic class there is just one (with voodoo two) options that get alot of help with his sig and that is Diabolo. The Damage reduction is so handy on many nodes and also he is super suicidefriendly. I duped mine natirally yesterday, but if i have gotten a mystic gem i would use it on him.
For my R3 Doom i used a generic on Cyberweekend btw Doom doesn‘t need it, but with high sig he make some annoying nodes like rage cheeseble
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The Damage reduction is so handy on many nodes and also he is super suicidefriendly.
I duped mine natirally yesterday, but if i have gotten a mystic gem i would use it on him.
For my R3 Doom i used a generic on Cyberweekend btw
Doom doesn‘t need it, but with high sig he make some annoying nodes like rage cheeseble