Found on AOStratics, quoted from the AO forums. Thank goodness, I say. <thinking of those PW borgs parrying every 2nd attack>
Mob parry skill
High level mobs have extremely high parry skill, which puts close combat professions and pets at a great disadvantage against them, as this comes in addition to high evades. Ranged and nano users only need to get past one line of defence. Any plans on tweaking the parry abilities, or otherwise making close combat professions and pet professions more useful in battling these mobs?
Parry is broken, bugged. Monsters with ranged weapons are not supposed to parry. Nor should it be possible to parry ranged attacks. This is a bug, but I don't know exactly which patch it is due for.
{Comment from Cz: I spoke with Johan about this too, and we have tweaked the Parry skill of the super bosses a few times already, and might make more tweaks later. Mobs will vary though, and some future mobs might not even have any skill in Parry at all.}