Mae Govannen and well met
I have a suggestion for Imlardis faction which was my favorite in older version of Edain mod.
Here are the facts that were stated in Silmarillion
High Elves and Elves of First age ( Noldo, Vanyar ) were the most powerful and most feared of any race/faction against Dark Foe of the World , Morgoth. Keep in mind that Sauron was just his puppet. Elves in general posses superior strength,stamina , they are wisest and they do not suffer illness.
Along with that they have centuris , some ages of combat experience which can make them nearly perfect.
Names like Maedhros,Fingon,Finglofin,Curufin,Turgon,Finrod are legendary. Imlardis are direct descendants of Noldo, but very few of them left in Middle-Earth.
They have the blood of Firstborn in their prime and I honestly think you should make them the best overall units in game, but without making them super overpowered to break balance.
Nevertheless they should have highest damage and highest quality armor ( next to dwarves ) We know that dwarven and Elven armor are of the highest quality, Elf smiths Celebrimor and Feanor are 2 most renowned ever and Dwarven Mithirl mail is incredibly strong indeed.
Or Give them unique abilites which will not be avilable to any other faction like passive ability to reduce enemy armor/dmg, fear immunity, inspiration to other troops and ability to give major experience to others.
I loved the way you introduced Imlarids faction in 3.8.1 but I have some other suggestions regarding units.
Imlarids faction should be played carefuly and with use of tactics due to fact they have low units per group and takes longest time to reach maximum potential.
All units have fear immunity since start, no additional level required.
All units start with max level and upgrades.
5 per unit max. They are very powerful.
Increase built time, Increase cost.
Power of the Eldar and Firstborn - Very high poison resist , we know that elves do not suffer illness and are very resistant to it
Rivendell Archer - 30% Range and attack was too overpowered. It should be reduced to 15% -20% max.
Increase the armor furthermore , but reduce their speed. Slightly decrease attack speed.
Rivendell swordsman / Passive ability Blade storm , temp boost to attack damage while slowly draining HP. If they survive the fight, they regen again.
Rivendell lancer - Mental fortitude - passive ability. Cannot be knocked down by cavarly , only large monsters like Trolls or Mumaks, dragons, etc..
Slighty decrease their HP. Increase Armor.
Improve defence against trample damage and cavarly esp Mordor cavarly ( Morgul something I forgot their name )
Lancer is weak to swordsman , not cavarly or archers.
Rivendell Champion , My favorite unit. 2nd deadliest imo it should be. Elite infantry
Upgrade ability -Fury of blades , Double the attack speed for short duration, can hit 2 enemies
Upgrade ability - Wrath of Orome - Enemy infanty flees in terror for short duration, but cannot be attacked for 10 - 15 sec
Passive ability to Champion. Blood/Dying rage - Boost to attack damage when health is lower then 30%/15% 30/50%
Master infantry
Watchdog of Imlarids - PLEASE rename it, its silly name watchdogs for Elves.
Rename suggestions
Vanquishers,Immortals,Shadow slayers,Noldo veterans..
Best of the best troops, veterains of countless battles, dressed in white or red, Huge HP , Very high damage, high armor, medium speed.
Passive ability Inspiration buff, You presence inspire others , +25% damage and 25% armor bonus for other infantry
Passive abilty - Invincible , ( name ) will fight when HP is drained for 7 sec.
Upgrade option N1 - Raging Frenzy -Boosts attack damage based on overall HP
100 -80/60/40/20 - 20%/40%/60%/80%
Upgrade option ( Wisdom of the ancients ) Dual wield option , Two handed option
Dual wield - Increases attack speed by 30% can hit second target with 50% less damage
Two handed option 20% damage 25% chance to paralyze enemy target for 3 sec All except heroes and very large monsters.
Upgrade option N3
Blessing of Eonwe - Targeted infantry receives bonus damage against Heroes
+20% damage against enemy hero.
Note: You can only have 1 upgrade ability so choose wiserly.
3 max units avilable to build.
I'll update soon more! Hope you like some of it !