hi anonymous, I believe that the ebon set is a rare drop for COH1 and 2. this means that the bosses in COH also drops other set, and when other set is dropped, you will not loot ebon from that boss. what the website tells you is: if the boss drop a ebon armor, it will be purple. it doesnt necessarily means that you will always get ebon drop from every boss.
in addition, I have also farmed coh 1 many times, I have seen ppl loot ebon ring, and head. I, myself, has ebon neckless loot and ebon one-hand weapon from boss. so to sum up, it all depend on you luck, so wash your hand and face before playing, and pray to god for ebon drop...lol...good luck

and also to answer your other question in the following thread:

1. Does anybody know if the group bonus from the final passive stacks? no it doesnt stacks. so if you see other grp member got ebon 5 set, you dont need to wear it for extra bonus. but, i guess no one will care if you still do.
2. If they are bind on pick up, how can these pieces be sold? in the older version of game, ebon set are bind for equip, so you still can find some of the ebon gear from guild store, because they are from ppl's old stock. at the current game version, ebon/warm cult/senct are all bind on pickup. so you wont be able to sell it. if you want, you'd farm hard for them.

continuing to answer your questions:
3. Any idea on where would be the best place to grind for theses set pieces? ideally, you will only have to farm for coh over and over again until you have collected them all. in regards to trait, I guess for a tank, we do not care about trait that much. i mean, ideally, we would want 5 set to have trait of sturdy, but devines are ok. for tanks, must important parts are: a) familiar with boss, and know when to dodge/block; b) hp values, and physical/spell resistance. therefore, trait on armer are not critical for us (note: i didnt mean traits are not important, but not sooo critical for tank compare to trait for dps class)

I think thats all you need to know. and good luck in game. I have got 5 set of ebon (head, shoulder, weapon, neckless and one ring) the slot are not very good, so I am still farming for the rest 5 pieces. the most ideal set will be ebon jeweries (neckless+2rings) + ebon weapon and shild. so that you can still equip undaunted 2 sets + any other 5 sets(normally, pleadgue doctors 5sets, or undaunted armory 5 sets)

I've managed to get everything but rings and a chest piece. One time my group got a chest piece but it was a level 40 char. It can be frustrating but think it will be worth it once I have a complete set.

good

you cant sell it it is bound. You can only trade it to people that were in you party in the dungeon

Good for pvp group support that's about it, wouldn't wear this for pve content so I agree.

This is for endgame LMAO You can run most the vet dungeons in ESO in random pieces...Everytime I see a comment like this I say to myself. "Must not be playing the game to its full potential poor pleb"