While you have a list of suitable monsters to run, you don’t need to have the encounter completely planned out. You prepared yourself to improvise having this list and thus will be able to throw in more or less monsters.
Help your party
When things go sour, you can always help the party out some way or another. This might even create an upward beat
Boss fights
You should not use these for boss fights.
Reference
E. Schea, M. (2018). Sly flourish’s return of the lazy dungeon master. Sly flourish shop
Highlights or timestamps
Return of the Lazy Dungeon Master Highlights
- This style of organic combat encounter building works well most of the time - but not for boss figths.
— ^0266a7 from Return of the Lazy Dungeon Master highlights