One think I was thinking of, when it comes to Mirkwood, is that they seem like they would be the more lightly armoured faction. Like Tolkien says that the Silvan Elves had poor armour and weapons compared to the Noldor, so for gameplay purposes they can still have high armour rating, but what about a different "armoured" look. I'll try to explain with pics.
When I look at this pic of Legolas, I think Sentinels of the Woodland Realm.
But what if their more combat ready "heavy" version weren't decked out with armour, but instead had basically this look, with leather and some shoulder guards.
Theoretically, I wouldn't think Mirkwood would be heavily armoured most of the time, but this would create another unit, that could essentially be "heavy sentinels" without putting all of that "lore raping"
heavy armour on them. Just one thought I had, because the Sentinels always seemed like the perfect Mirkwood archer unit, but even though I love the Heavy Archers, they don't seem natural to the Silvan units.
I have a couple other ideas, but I'll write them up later. Just let me know what you think Curufin! If you don't like it, no problem