Some mystery have priority over others aside from position.
Interrupt > others when there is something to interrupt
High cost > low cost
And, I believe, one of them is Barrier > non-barrier.
I don't think I have ever seen a barrier to be not cast when possible except in the case of interrupt in the many obviously AI opponent's I've fought in survival. No hinata, no fire main, no kabuto, always the sasuke(being the most common)

So it probably isn't a bug, thou it would be nice if we can set priorities ourselves.

I agree, i dont think it is fair that we can't setup which mystery goes first if there is two options. like ten2 always goes first if mei is on the playing field and they both have the mystery available to them --- not even initiative affects this.

This is not true. Mei comes first if you placed her on the field after tenten.

You can make the AI prioritize other mysteries before barriers. Hope this helps.

Mystery casting priority:
1. Interruption / Acupuncture. First CC ninja wiggled has highest priority
2. Some mysteries has conditional prioritizing based on how many remaining enemies, such as Kazekage Gaara
3. The last ninja wiggled has highest priority. (including barrier casters)
4. Some mystery skills has lower priority, such as Hidan and Hinata.


Mystery buffs:
- Target ninja buffs (Gakido, Killer-bee, etc) will be applied to the first ninja in the wiggle order if everyone is at full health.


Placement order for enemy interruption:
- Enemy interrupt ninjas will always target the first in the wiggle order if multiple ninjas were to cast a mystery on same round
- If you swap team or relog, wiggle order needs to be set up again for making this work.

Barriers:
- The last wiggled auto-barrier will be the active one This post was last edited by Eplox at 2017-5-11 15:37

I will show you videos even in 9tails with all the different setup I have tried. I am not talking about her passive barrier i am talking about mystery

That still doesnt make it right for them to choose. I think that we should be able to set who sets off mysteries go first by positioning and placement just like how buffs and clones work.

I get what you are saying, and I'd love to see more customizability as well.
But the game is made to please the average player, not necessary those who want's to control every bit of it. Having a "smart" AI that takes a decision for you, like whenever to AoE nuke, debuff or use a single target skill may benefit the average player more.

Just my opinion.

This is absolutely correct.

As for your suggestion for customizations.
I've noted it down.

To answer the thread it's not a bug.