so my team decided to go for all out assault on the nemesis at the start of the quest, as we defeated Snak Craggle before any peril effects, we basically just ignored them as he was defeated. Was this the correct thing to do?

Also we rolled a few nemesis attacks through the later stages of the dungeon, but again he was defeated sooooooo, we decided as a group his attacks weren't possible.

Can anybody clarify whether these were the correct actions to take?