Which bosses has increased resilence/ are become stronger?

Question

I heard that some bosses, like Ferumbras, has be "upgraded" with increased resilience in order to give chance for more people participate in the battle. Does it affect all Nemesis bosses or only few of them?

Answer 1

The new system only affects retro world bosses:
- Ferumbras
- Ghazbaran
- Orshabaal
- Morgaroth