Hi out there i read a lot the Forum and may be all of the highrate Guides, but havent found the answer on ym Question.
I like to push my Wizard and Warrior on Eternatl Ascendet and i am Wondering if they need 200% XP gain on there Equipement or only the XP gain on my Main Affect them?
You will need XP gear on both characters 
Great that helps me 
Does Epiphany Effec XP Gain too?
With Mythstones i cant get 200% XP on the Gear.
With Epiphany and Fauns Ring/ Adventure Hat Eternatl it could be 230% per Character, does it works?
It should but that mean you will lose 11 affixes to boosting XP so watch out 
You are right and i wont use it because of the possibilty to farm crystal and eternal legends for crystals.
@Griffin012
Crafted the Gear and got on both main and hireling 6 Quest Stones and the stats page shows me 150% total XP gain, but the average must be 200%. What is wrong?
If your characters are different levels you get diminished XP
@Griffin012 thanks for your help again
thought about the lvl too, but they are both 91
Weird 
could you PM me the adventure page on both your hireling and main as well as the gear you’re using please? 
I’ll look into what’s going when I wake up
@Griffin012 i dont know how to screenshot with the firetv.
What i figured out so far:
Equal lvl both (lvl 91) both stat page show 150% Xp
Main toon lvl 92, main toon stat = 196,1% Xp
Hireling lvl 94, hireling stat page = 201,3% Xp
Main lvl 92 =144,1% Xp
Hireling lvl 95 =151,9% Xp
Main 91 = 188,4% XP
Hireling 96 = 203,8 % Xp