So if there is something to be learned here, is that you have to be careful in designing encounters. 5e is not 4e which was designed with restrictions but with balance in mind. 5e's objective is NOT to be balanced, for once, so if you introduce further imbalance, you will get very swingy situations, and it's not really fair to say that the design sucks, when the problem is the unbalanced way you are using it, not even correcting for the imbalances that you are introducing (overly powerful PCs for their levels but therefore weak defensively, imbalanced monsters).
ncG1vNJzZmivp6x7prrWqKmlnF6kv6h706GpnpmUqHyjrcZmpp9lkpqur7%2BMpKClpJWZenN5z5yqZqufobxurs6sqp6rXajCpLeMmqWdZaedsrOxjK2mZp%2BfYrOzu8xmn56qlWODeX6XbmdoqJGcsm5%2B