Procmod

Procmod (shown in Lucy as the procratemod field) is a hidden item stat which describes a modified rate that the weapon will issue a combat proc.

This attribute was added to weapons with combat procs early in EverQuest's history, certainly by Luclin but possibly within the classic timeline. Documentation of procmod's addition and procmod values on various items in classic EQ is very scarce.

In 2013, nilbog removed several default procmod values from items inherited from eqemu due to lack of classic documentation of procmod's existence. This means that in 2013, all procmod values were normalized to be the same on P99. [1]

Nevertheless, some players have observed higher than usual proc rates on certain weapons, especially rain-type AOE procs like Adamantite Bo Stick. It remains to parse these weapons to demonstrate this.

Allakhazam wiki documentation

The allakhazam wiki contains several pages documenting the procmods of various items. This information is all very post-classic (late 2012 is the earliest seen date in web.archive.org). However, this could be a starting point for discovering items with higher procmods on P99. See [2] and [3].