I apologize in advance if this would be complicated for coding and if this was already suggested. This suggestion is for the addition of Status Effects or Skills for different armor sets in every faction which can be worked upon and given names. This could be in a way to add a little bit more fun and roleplay to a single-player world or a server plus some skills are already implemented (Morgul Armor, Galadhrim Cloak). But also to make it fair I think you need to have at least an alignment of 1500 in a faction to unlock it's armor skill. This way it won't be as easy as making an armor set and putting it on. Here is a few suggestions to show what I'm thinking of how powerful these skills would be and how it would be lore-friendly to the mod itself.

Keep in mind only players are effected by the effects, cooldowns are activated once the effect is over, and the skills can be activated by superior armor sets in the same faction ex. Mordor Armor and Black Uruk Armor

Rohan "Rider of Theoden": While riding horses your melee weapons deal +1 more melee damage (Most of Rohan's military are cavalry and they specialize in Horses)

Half-troll "Thick Skin": 2 more armor points (They most likely had durable skin considering their relations to trolls)

Dunland "Berserker's Rage": Every 2 hearts you lose your melee weapons gain +0.5 damage (This is based off of a Berserkers high pain tolerance and possibly increased strength based off of the "medicines" that they took)

Dale "Longbowman": Dalish Longbows have increased damage of 20% (They are renowned for their skill of the longbow)

Dunedain "Disengage": The first ranged hit you take you gain complete invisibility for 2 seconds (Including armor) and Speed 2 for 5 seconds the cooldown is 60 seconds (Rangers have their ways of sneaking in the shadows)

Durin's Folk "Armor Mastery": 16% more projectile protection (Dwarven armor are more effective than any armor made by other races)

Blue Mountains "Dragon Slayer" : 16% more fire Protection (Armor was effective against fire from dragons due to the steel covering their face)

Wood Elves "Agile": 20% more speed and 25% more Jump boost (They are quicker and more agile because of their way of combat in Mirkwood)

Rivendell "Combat Expertise": All melee weapons gain +1 damage and bows gain 10% more ranged damage (High elves areelite in combat)

Lindon "Combat Expertise": All melee weapons gain +1 damage and bows gain 10% more ranged damage (High elves are elite in combat)

Lothlorien "Archer of the Golden Wood": All bows gain 15% more melee damage (Galadhrim Elves are great Archers)

Mordor "Inner Hatred": When near any NPC or player you gain Strength 1 for 3 seconds the cooldown is 3 seconds (All Orcs have a deep hatred within themselves against everything that including other races and leaders among them)

Gundabad "Strength in Numbers": When near at least 2 Gundabad orcs or players wearing a full set of Gundabad armor enemies who attack you gain Weakness for 3 seconds the cooldown is 3 seconds (Most Gundabad orcs fight with a large group to overwhelm their enemy. Increased number's give them more morale and increases fear with the enemy)

Dol Guldur "Corrupt": Every 3rd hit you deal you gain lifesteal of 1 health (Dol Guldur is shrouded in sorcery and the magic is known to corrupt plants and animals)

Isengard "Bombardier": 50% Blast Protection (Used orc bombs in sieges ex. Helms Deep)

Over time I'm planning to add or change any factions skills based on things you guys come up with or some that I have thought of myself. You are free to leave your own suggestions in the comments. Thanks for reading!