Antorus bosses from a Shadow Priest PoV

1. Garothi Worldbreaker: single-target, brief moment at two specific intervals in which two cannons appear and one must be killed in a short time.
2. Hounds of Sargeras: two bosses that share health (not on mythic) and must be tanked more than 40y away.
3. War Council: three bosses but it's like sisters, only one active at a time. Lots of adds, but they live long enough.
4. Portal Keeper Hasabel: one boss that summons packs of low HP imps relatively often. At one point a big add appears in a different platforms (don't be in the portal group if you value your voidform stacks).
5. Eonar: if you thought Maiden of Vigilance was bad for Shadow, this one is ten times worse. An add fest without a main boss, think Hellfire Assault in a huge area with paths; it's basically tower defense. Lots of adds with no aggro that can and must be CC'd, most of them have low HP, but there are a few important adds with high HP. When one pack dies you have to move to another spawn point, and there's a lot of distance between them. I found it impossible to use Mindbender efficiently here; Misery all the way.
6. Imonar the Soulhunter: purely single-target. Two brief intermissions in which you run across a long bridge with nothing to attack.
7. Kin'garoth: one main boss with moments in which three big adds appear and you have to kill them before they activate. They are too far apart from each other to DoT them all before they activate and move to the boss, and the most popular strategy is to divide the raid into two groups and kill two adds before they activate, then deal with the third one when it's active.
8. Varimathras: purely single-target. There are adds on mythic but you're not supposed to make them spawn.
9. Coven of Shivarra: three bosses (four on mythic) that share health, but only two are active at the same time, and must be tanked away from each other; it's basically like Dragons of Nightmare, they even have to be tank-swapped the same way. Brief moments in which they summon four immobile adds in different parts of the room (at least that's the case for Aman'thul's Torments).
10. Aggramar: single-target, with two intermissions in which you must kill several adds before they reach the boss.
11. Argus: no info on this boss yet.