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<blockquote data-quote="NotAYakk" data-source="post: 8004007" data-attributes="member: 72555">So, take champion 3 rogue 17 with elven accuracy and advantage, dual wielding.The crit chance per swing is 1-.9^3 or 27.1%.&nbsp; Their miss chance against AC 8 is 0.0125% (basically zero).A simple play is to make an attack.&nbsp; If it crits, use sneak attack.&nbsp; If not, you save your sneak attack for your offhand attack.This gives a 27.1% + 27.1%(1-27.1%), or 46.9% chance to do a sneak attack crit.&nbsp; And your chances of landing a sneak attack remain basically 100%.So you deal 9d6 * 1.469 + 2 * (1d6+5) + .271 * 2 * 1d6 or 65.1705 damage per round (and a bit more on action surge rounds).The calculator says this build does 55 damage per round.I suspect your calculator doesn't crit-fish with sneak attack.As a general rule, if your chance of missing with all remaining attacks is less than your chance of critting on all remaining attacks this round, you should hold off your sneak attack unless your current attack is a crit.Given a miss chance M% and a crit chance C%, we can say how many attacks we should crit fish for.&nbsp; Once we have done this, we can calculate what our sneak attack chance is and our sneak attack crit chance is this round.</blockquote>

[QUOTE="NotAYakk, post: 8004007, member: 72555"] So, take champion 3 rogue 17 with elven accuracy and advantage, dual wielding. The crit chance per swing is 1-.9^3 or 27.1%. Their miss chance against AC 8 is 0.0125% (basically zero). A simple play is to make an attack. If it crits, use sneak attack. If not, you save your sneak attack for your offhand attack. This gives a 27.1% + 27.1%(1-27.1%), or 46.9% chance to do a sneak attack crit. And your chances of landing a sneak attack remain basically 100%. So you deal 9d6 * 1.469 + 2 * (1d6+5) + .271 * 2 * 1d6 or 65.1705 damage per round (and a bit more on action surge rounds). The calculator says this build does 55 damage per round. I suspect your calculator doesn't crit-fish with sneak attack. As a general rule, if your chance of [b]missing[/b] with all remaining attacks is less than your chance of [b]critting[/b] on all remaining attacks this round, you should hold off your sneak attack unless your current attack is a crit. Given a miss chance M% and a crit chance C%, we can say how many attacks we should crit fish for. Once we have done this, we can calculate what our sneak attack chance is and our sneak attack crit chance is this round. [/QUOTE]

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