As I understand the only xp bonuses who don't stack is the various potions and scrolls.Yes, it does stack with various other bonuses in game: XP potions/scrolls, grouping bonus, married characters, various PvP XP bonuses etc.
https://forums.elderscrollsonline.com/en/discussion/258018/eso-anniversary-event-xp-buff-stacking
If you read there they explain, though they mention a bug where XP was capping but that was fixed.
@ZOS_JessicaFolsom any comment on if this pertains to all events...
"It is currently possible to stack XP buffs for a total possible increase of 85% for most types of content. There is normally a cap in place that prevents any event (a quest completion, a monster kill, etc.) from granting more than 10% of your total level value. For the anniversary event, that cap was raised from 10% to 30%."
Hi,
Please can I confirm if the XP pots will stack with The Witches Festival Event, so will we get an XP boost for the Witches Festival in addition to a 150% XP Boost for Mythic Atherial Ambrossia.
If someone please can confirm 100%.
Many thanks in advance.