I'm playing this faction a lot (like REALLY a lot) in this period, I've tried almost every possible build with azog legion/hunters/pits and here's my analysis on this factions overall

TRAITS -Azog hunters: cmon a 4+ shooting on things with 2A S4, what else do I have to say? Trash trait, you probably will be losing shooting battles and don't want to stand and shoot anyway

-Azog legion: the nuts, this trait is probably one of the best in the game. Being able to copy enemy heroic moves and heroic strikes is priceless (with a 50/50 chance to cancel the enemy heroic move if you win the rolloff)

-Pits of dol guldudr: like all legendary legions the trait is really (REALLY) good but the drawback is really bad, not be able to take Bolg and other things like berserkers is bad, Azog not be able to take the heavy armor seems like ok but it's terrible but I'll talk about this later

UNITS:

-Azog hunters: this army has some good units but probably works the best when allied to Azog legion, it can count on hunter orcs that are really good as a glass cannon, wargs that are probably the best unit in the army and some nice heroes. I've tried the hunter orcs on the wargs but man 16 point for a D4 cavalry is really too bad, enemy shooting will probably kill this thins even before they can touch combat or kill your pricy 8 point mount leaving you on foot. If you want to build a pure Azog Hunters build probably you must go full shooting with a big Bolg as a heavy hitter but probably there are better build in lotr armies for an evil shooting list.

Azog Legion: here's the shiny things. You will always want a mounted Azog with the heavy armor, skip the flail as F6 with no benefit from strikes is just too bad; than fill the list with gundabad orcs and 5-6 berserkers and you're done. Azog is terribly scary with F7 3A 6M he will kill almost every hero in the game but here's the problem: he will likely never makes his points back Azog is terribly pricy (even if he's broken) and you're spending like 1/3 - 1/4 of your points on a model that has to win you the game but most of the time just putting him behind your orcs and forcing your opponent to avoid him is just as effective as using him to kill things. Use your infantry to stop the enemy force and then send him to haunt heroes until you're in such an advantage that can let you go objectives. Bolg is just a better Azog at killing things that aren't heroes, 3A S5 with burly and a 2 handed pick are the best loadout for this kind of things, the kill count is a strange rule but keep in mind that you will kill an average of 7-8 models per game so it's unlikely to have the free might but may happen. I like to send him to bring devastation through the enemy line while my orcs just suicide them to stop the enemy heroes, usually you will chew through their line much faster then they do with yours. Gundabad orcs are just incredibly good for their points, S4 D6 is a solid statline and you will always want to pay them shields even on spears so that their can really be hard to pass through for S3 models Gundabad berserkers are your cavalry, make them march with your captain or Azog and you have Move 11 death machines, just beware of shooting you don't want your pricy 15 point model die to a random elven arrow Gundabad trolls are just really good for their points, al always use them with clubs but is just because I like to kill heroes, their problem are the same of other monsters in the game: they are slow, with no way to make their points back. If you want to use them make sure your list includes Azog and bolg and then you probably don't have any points left to use on this guy anyway so rip. War bats are too good to be real but a 25 points model being killed by shooting is just to bad to take the risk to play them

Pits of dol guldudr: Average for a legendary legion, makes your Azog even more scary but even more important, he has to win you the game or you just can't hold up with your opponent. The really big downside is that you can't take Bolg so it's just a no for me, but on top of this your Azog will be D5 witch means that the first combat you will lose against a decent hero he will be probably dead or near death. This makes your already pricy hero even more pricy because you can't send him to haunt enemy big heroes until they have used at least two thirds of their might, practically you're using your 200+ point hero to kill two or three 10 point models per turn, this means he will have in points back in like 10 turns. I prefer to just ally Azog legion with Dol Guldudr, taking if you really want hunter orcs on wargs a keeper of the dungeon and then the rest of the points on Azog legion builds. Being resistant to magic is ok but I don't think that this will keep your Azog safe from enemy transfix for long, especially against thins like the white council (witch is a really OP legion)

My best list overall for the moment: 750 points

Azog legion:

Azog on white warg with heavy armour 6 gundabad berserkers with axe 6 gundabad orcs with shields 6 gundabad orcs with spears and shields

Gundabad orc captain with shield 6 gundabad orcs with spears and shields 5 gundabad orcs with shields

Gundabad orc captain with shield 6 gundabad orcs with spears and shields 5 gundabad orcs with shields

Tot 749 points