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Message: <blockquote data-quote="Tony Vargas" data-source="post: 6933069" data-attributes="member: 996">You can resort to the old trick of taking the average.  So if the DC is 13 and the save is +2, they've a 50% chance of making it, so half of them do.  If the AE is something like a fireball (could be more dangerous closer to the center) or otherwise suggests a pattern to it, you can use that as a guide for which ones failed and which succeeded, and thus dispense with rolls.  Of course, if a really large number of targets get caught in a damaging AE, it's likely they'll be popped by it even if they save (another good reason to roll damage first) - if so, there's no problem.Well, you could try to track positions and imagine the exact area in your head - or you could just rule arbitrarily based on whatever works for at the moment.If you want a 'system,' 13th Age has a simple one:   AE spells are just rated to affect a random number of enemies (more if you're willing to risk hitting allies, too).  Usually it's d3, d4, d6, that kinda thing.  Simple.You can also skip to a positioning aid just for that purpose, jot down the positions of everyone on graph paper, then calculate the area, and see who's in it.  Creatures on the edge can save with advantage or save for half or no damage, or just be among those you assign as saving 'on average' (per the above).</blockquote>