I recall you even beat the multiple waves oforcs in pathhfinder, even though the had healing through that fight... :P<br/><br/>5th edition builds encounters based on xp pools determined by the pc levels... monsters are worth an amount of experience based on hit dice and traits they have, but have modifiers to their xp counting towards the encounter budget based on numbers... 4 mounsters have 4 times as many actions as one so they are a tougher encounter than 4 individual monster encounters. (Then again we are not using experience rewards in this game, you gain levels after finishing quests.) For each level of a single character there is an xp pool for easy, moderate, difficult, deadly etc encounters. Totaling these for each member of the party you get an xp pool for designing encounters for that group, or to see an estimate of how challenging  a partcular encounter is. Also, monster CR means "for a party of this level", a CR1 monater can waste a single starting character in a turn...