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 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.