I have gone through several dungeons now, and every time a piece of heavy armor drops, I cannot roll "Need" as a Lancer/Dragoon, even when the armor specifically says it's equippable by Lancer/Dragoon. Since these armors are a specific tier between armors equippable only by Gladiator/Paladin/Marauder/Warrior, and those equippable by all Disciples of War, it's obvious these armors are specifically meant for Lancers and Dragoons, as we suffer the highest risk of taking damage out of all DPS classes. Yet, I cannot roll Need on them.

Time: All times
Frequency: Always
World name: Excalibur
Character name: Leuthil Kagizume
NPC name: None
Monster name: None
Class/Level: Lancer/Dragoon, all levels
Party or solo: Party
In-game time: All times
Area and coordinates: All dungeons
Steps:
1. Be Lancer/Dragoon
2. Receive heavy armor equippable by Lancer/Dragoon from treasure coffer
3. Not be able to roll Need on it