overgeeked
Open-World Sandbox
Yes. In the DMG under building encounters. And in the discussion of CR.Is that in the rules somewhere?
Not at all. Do what works for you. I ignore CR and encounter balance entirely. But speaking about the default rules of the game can be helpful.Have I been doing it wrong when I grab a bunch of mooks, a sub-leader or 2, and dial my encounters to "deadly?"
Absolutely. More weaker monsters is a tried and true tactic.Probably also worth pointing out that Bounded Accuracy, that much maligned, but oh so wonderful mechanic, allows me to use a dozen goblins instead of a single (whatever would be the CR equivalent monster to 12 goblins,) and still consistently deal substantial damage to my PCs. In fact, our most recent PC death was to a bunch of crossbow wielding mooks. Maybe that's the trick. Larger groups have been a bigger threat to my players than solo or small group encounters. Maybe that's specific to our table. Maybe it's worth trying for DMs that have had difficulty challenging their players.
Goblins are CR1/4 (50XP).
12 goblins would be worth 1800XP, the equivalent to a single CR5 monster.
Which is an appropriate challenge for a full adventuring day for six 1st-level characters.
According to the DMG, at least. But the CR and XP stuff is honestly terrible.