Armor class advice

Armour class(AC) is primarily used to oppose attack bonus(ab) which is the primary form of attack of most characters, player or otherwise, encountered in Neverwinter Nights.

Frame of reference
The following are some examples of what ab might be encountered.
 * At level 40:
 * High ab(Ranged): 52 Dexterity Elven Fighter 10/Wizard 1/Arcane Archer 29 with Epic weapon focus and Epic prowess, within 15 feet and under the effect of the True strike spell = 90ab.
 * High ab(melee): 48 Strength Half-orc Fighter 11/Weapon master 28/Druid 1 with Epic weapon focus, Epic prowess, and +20 weapon in natural surroundings, flanking = 83ab.
 * Simple ab(melee): 40 Strength human Fighter 40 with Epic weapon focus and Epic prowess = 49.
 * Low ab(melee): 16 Strength Dwarven Bard 8/Palemaster 10/Dwarven Defender 22 with Epic weapon focus = 33ab.
 * In player versus player combat it is quite common to encounter attack bonuses in the 60 to 65 range.