Simple. The Elves are from Rivendell, and never went past Goblin Town. The Beornings have been on the other side this whole time as well.

I was building it. Their will be more when this battle is over.

Oh no, I'm afraid you're on the wrong Topic. This is the High Pass, not the North Downs.

Also, can you respond to my move?

So, first off, these are your unit lists, right?







So first, let me address the "blanket" and the Elves jumping the wall. You say you're using seventy scorpions, ten siege ballistae, and thirty ballistae, right? Well, from what I can find, scorpions can fire off three or four shots a minute, so let's say that they collectively get two hundred and fifty shots off per minute. Ballistae I don't have any official numbers, but I would estimate to maybe one or two bolts per minute, so we'll say fifty total. The siege ballistae are slow enough that they're not going to be very significant, particularly against infantry. So, if you three hundred shots fired per minute fired in volleys every second, then you've got five bolts every second. Spread amongst a twenty-foot wall, that's one bolt for every four feet of wall. If you fire them in volleys every five seconds you get twenty-five bolts per volley, or a bit over one bolt per foot.
Now let's say that there's an Elf climbing every two feet of wall. If you fire a volley per second, then you should hit about half of the Elves (not necessarily defeat, as it may not be a very good hit). If you fire a volley every five second you'll have a much higher success rate, except for the fact that the Elves could time things so that they go over the top in between volleys. As for the Elves then fighting the pikemen, that would depend upon what the Elves are carrying. If they've got shields, then many of them could block that first stab and then be able to attack the Orcs, also allowing more Elves to come up behind them. Also keep in mind that if you've got Orcs at the top of the wall, and you're also firing low enough to the top of the wall to hit some trying to slip over, there's a good chance that you'll hit your own Orcs.

As for the siege weapons attacking each other, I think your numbers are a bit off. Assuming all ranges are equal, you'd probably get off your first shot just slightly before 8L gets off his. You wouldn't likely get a second shot off before 8L's fire. Actually, that wouldn't apply to 8L's trebuchets. Because trebuchets have to be reassembled after moving, you'd probably get two shots off on them with your trebuchets. Oh, and the first volley of everything isn't likely to do much, as it'd mainly be gauging range. Actually, since there's a wall in the way, it may take several shots to gauge the range.
However, the ranges of these weapons aren't equal. Trebuchets have a range of about three hundred meters. Onagers and mangonels I don't know, but I would guess about two hundred and fifty and two hundred meters, respectively. Ballistae, on the other hand, have significantly longer ranges. Scorpions can fire about four hundred meters, and ballistae over four hundred and fifty. Siege ballistae would probably be around four hundred meters. So obviously the ballistae of various types would be able to open fire before the catapults, and then casualties mainly depend upon how 8L attacks with his weapons.
Also, when did Gotee say something about a forty-five percent hit rate on my stuff at Dimrill? I don't recall any such thing.

And now the Trolls. I agree in part with both of you. Yes, arrows aren't going to be very effective against an armored Troll, as most of the arrows will go through the armor and then just a little ways into the Troll's skin. That's not to say, however, that the Trolls are immune to arrows. For one thing, all armor has some weak points (particularly the joints). Fire enough arrows, and a few are bound to land in those weak points and further injure the Troll. Same goes with the Troll itself, as it also has some soft spots that are easily injured, such as its eyes, mouth, and stomach. So if you fire enough shots, you're going to take the Troll out eventually, it just might take a while. Plus, even non-fatal hits (those going through the armor and into the Troll's skin) will do some damage. As the Troll moves around, his body will move relative to the armor, effectively causing the armor to wiggle the arrows around, widening the wound. The more this happens the more pain the Troll will be in and the more blood he'll lose, and then he'll eventually pass out from one or the other (but not before severely weakening him and perhaps causing him to go on a rampage, smashing friend and foe alike).

For the Beornings, 8L does need to show how he's getting them past the tanks.

They can absolutely hold them to their front-left (or right), though directly in front is difficult (assuming that they're using a ladder). Depending on how they're climbing up, though, they may be able to put their shield-arm up over the top of the wall first, and then heave themselves up behind. I don't really have the information to say whether that'd be doable right now, though.

Not that I know of.
As I said, his losses would depend upon how he approaches things. I don't know exactly how he went about using his artillery, or how quickly/far he approached with them and that's what chiefly determines what each of your losses would be.

If that's really how thick your Troll armor is, then know that what little mobility Trolls typically have is just about gone. Expect them to take several seconds at least to turn around. However, even with such thick armor, you still have the weak points (if you have solid plate over the joints, then your Trolls are statues ). Joints are going to have to be lightly armored to remain actual joints, and an arrow could definitely pierce through there. Even though a hit like that wouldn't be immediately lethal, it would have the strongest effect of any area in the way I talked about before. Plus you've got the eye-holes, which the smaller you make those the poorer your Trolls' visibility will be.