Strength can go to class 100 depends on how muck life force he absorbs, same with his durability. Come on dude he nearly killed spiderman in his first encounter and spiderman was throwing everything at him but the kitchen sink. In November Spiderman: Other , spiderman is on death's door none of his rogue gallery every did this to him.
Spidey beat him by injecting Radioactive fluid into himself he then proceeded to let Morlun drain his life force, where the radioactive fluid seriously messed him up. Morlun up to that point was practically invulnerable to everything Spidey threw at him.
Morlun should take it if Deathstroke doesn't know his weakness.