Ok, I got an idea about third unit, just I need some backup by design and look about unit. (LordDain's idea in general)
Ered Luin is faction with OP heroes and infantry with great armour, so maybe is not bad idea to add some siege shield as new unique siege unit. As LordDain said, this fits nicely in faction global properties.
So idea is that new "siege shield" will be support unit for catapults. So this unit should protects catapults from other siege attacks, and also against arrows/fire arrows. Health of this unit shouldn't be great. Enought hp to block damage of 2-3 shoots of other catapults (depends on type of attacking unit) and ensure survival of Ered Luin catapult. So this unit represent support siege unit. When it is ussed on catapult, it protects catapuls from attacks, but immobilise catapult in short period of time (can't move, can shoot). In general maybe to produce unit which is similar to "uruk shield", but for support of siege unit.
Some pictures I found:
Futhermore,also got idea how to make shakers more useful. Maybe would be nice to add new kind of form which will be selectable for shakers. I got idea when was playing with Necromancer, and with that unit we have possibility of chose between two forms (Attack=Fire form, Support=Dark form). So two forms for shakers, Disable unit form in whick shakers have attack of shorter cd (really shorter!), but their attack do only disable on units (almost no damage to buildings), and Building destroy form in which shakers do what they do now, do a massive damage to buildings, but have great attack cd.
Also to somehow make some armour upgrade for them, which will make them stronger and more durable.
About ballista for iron hills I suggest that unit will have only monster slaying role (shooting on trolls, giants, mumakils etc) and will do small area disable damage on units (almost no damage on units, only disable). This makes balista and earth shakers almost in ballance, both can somehow disable units and have different roles.
Also I have idea about adding new kind of building for dwarves in general. That building will be required for production of new elite siege units, also won't be soo expensive and will be required for casting "Earthquake power". Look of that building will include already known Earth Hammer:
Insted that aside poles
(Remove poles), I will suggest new aside parts like 2 new structures, maybe look of that aside buildings will be similar to red/black circled one from this picture:
And on that new aside parts (structuress) will be represented some symols of balista/siege shield, so we have unique bonus siege building.
Edit: Ok, also what about idea of integration of Windlance insted siege shield? I know this sounds maybe funny, or too difficult, but maybe windlance is good siege weapon for Ered Luin (One existed in Lake Town, and LT is Ered Luin's Outpost).
Windlance could have unique property of attacking only flying units so this unit will be useful against Smaug/Dragons/Fellbeasts/Eagles/etc. Windlance could have model of smaller ballista, and it's attack projectile model should be black arrows models from game (with maybe size modification).
So we will have next trio : Siege shield/Earthshaker/Ballista or Windlance/Earthshaker/Ballista.
In my opinion it would be sad with no trying to implement this epic sieqe weapon from movie... I presume that model is difficult, or maybe is better question is possible to make that Windlance like balista attack air units?
What you think about this? Similar ideas to help polishing this suggestion?
Umfrage