I think you should re-enable your dodging skill to improve your EV too.
According to the wiki AC depend a bit too much on luck to be reliable.
AC reduces the damage of attacks susceptible to AC by an absolute value between 0 and your current AC value
Meaning that even with an insane level of AC, you always have a chance to being hit with full damage.
And even if you're lucky and obtain a random AC number that would be superior to the damage you are receiving, it does not even block it entirely, as there is unfortunately a "guaranteed damage" that your health will always recieve.
By example, you have an enemy that put a huge blow and hit you with 20 damages.
Let's say you're lucky and your AC random number got 24 , your current max AC.
Instead of recieving 0 damage, you will recieve, according to
the formula :
(base AC of body armour) * (13 + Armour skill) * (maximum damage of the attack) / 1700
meaning with your current character that the guaranteed damage you would recieve despite your random AC result of 24 on a blow for 20 damages would be
24*21*20/1700 = +/- 5.9
So you'll always recieve at least 6 minimum damages on your health for an originally 20 damaging hit.
That's why i think you should continue to train your Dodging along your Armour skill, so you have more chances to avoid entirely an attack, while keeping your AC high to have some chance to lower the damages.
EDIT : mistook minimum damage recieved and minimum damage blocked by the AC.
The 6 minimum damage is actually the minimum damage your current AC and armour skill will block on a 20 damaging hit.
That's much much better than my original understanding, as then your current AC would block from a 20 damages hit between 6 and 24.