Hi rAthena, long time no see!!
After a few hours of research, i found that devotion skill give shield buff and other buff like Endure.
I don't know if i have a real information but according to iro wiki and ratemyserver.
So I tried adding a stateicon for the Devotion skill, successful as you can see.
And I said to myself ok, now I'm going to see if the icons for Endure, Auto Guard and Reflect Shield appears when I am under the influence of Devotion and it looks like only the