So I made an encounter and I'm not quite sure what the best way to judge CR is.
Scenario I created: The party enters a very large room filled with Sarcophagus. They see two CR 3 Spriggans drive a spike into the ground that awakens the nearby tombs. 5 Skeleton Dwarves rise up, they do this again one more time before they are stopped so a total of 11 Dwarven skeletons and two spriggans. Now I gave the dwarves a d8 weapon and an extra AC plus an extra +1 to hit.
The party members were 4 level 3s. Now I'm just trying to rationalize what the CR of that encounter was.
