I had this one in my mind for a while. We all know how annoying it is when you miss your attack and a well planned strategy goes down the drain....
....so using monsters with skills that have a 100% accuracy is something I very much appreciate. However, I only know of a few but I am hoping to discover more which I intend to periodically add to this OP. Here are the few I know:
Nemestrinus - Alpha Declaration, 55pt neutral single attack, remove good effects.
Arch Knight - God's Will, 70pt light single attack, heals 20%
General Thetys - Stamina Devourers, 20pt water AoE attack, removes all stamina
Galante - À Toi, Pour Toujours, 30pt neutral AoE attack, blinds all enemies
Barbatos - Master of Pain, 90pt single dark attack, lose 30% of life
Volray - Infinity Voltage, 20pt thunder single attack with 20pt residual thunder damage gains extra turn (it says 85% but never misses)
Lord of Atlantis - Cleaning, 35pt water single attack, remove all positive effects
In addition to the above skills, all default skills (the two skills monsters have at Lvl 1) are 100% accuracy skills. Most of these are two weak to worry about with two exceptions:
Layth - Ad Leones, 45pt single physical attack
Mommy - Don't Lie to Mommy, 60pt single dark attack
Also, it seems that every zero damage skill that only applies various effects is 100% accuracy despite the fact that some say 95% on the wiki, eg. Timerion's Cooldowns Activated.
And unbeknownst to me (as I don't have them), some Nemesis have 100% accuracy skills:
Warthak (all three) - Dawson Ghost, 40pt AoE neutral attack, Broken Petroglyph 35pt single earth attack, Damaged & Restored & Perfect Petroglyph are 30pt & 40pt & 45pt AoE earth attacks. All of these skills block shields from one enemy.
Faraday the Electrolyzer - Nine Tails Zap, 40pt AoE thunder attack, applies blind to all
and Lightning Strap, 60pt single thunder attack, applies blind to target
Talos the Automaton - Iron Buckshot, 35pt AoE metal attack, applies bleed to all
Thanks to everybody who is helping to expand this precious and still quite short list. Keep posting if you find one and I shall update ;)