Simply say the Minecraft mods that you can't easily kill.
I believe you mean "mob", not "mod".
I've come up with approaches for most of them, but haven't played to encounter some of them.
Mostly they're a matter of minimizing their ability to attack you by dodging or using cover until you can snipe them back or rush with a weapon. Having a shield helps with the latter.
I like to use fences and lights to create "pastures" where mobs can't spawn. Zombies will collect outside that, but I can stand off and slash them from the other side of the fence.
These can cross my fences, but if I have at least 16 blocks of lit space around me they won't rush me as hostile and I can control the encounter.
I don't like them, but with terrain (fences) and a good bow they're usually easy to pick off.
Annoying, but not too dangerous if you fight them in safe terrain.
The "pumpkin helmet" helps, but I usually arrange a two block high alcove to fight from and attack their legs to keep them from teleporting away.
I usually encounter them only when I build a gold generator, so they're contained in a mob grinder.
I rarely encounter other hostile mobs. The zombie trap horse is just a gang of skeletons, really.