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General Tabletop Discussion
*Dungeons & Dragons
The math of Advantage and Disadvantage
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<blockquote data-quote="Keravath" data-source="post: 7523425" data-attributes="member: 6916036"><p>Unfortunately, your comments are incorrect which is why I posted the table in the first place.</p><p></p><p>Would you agree that an AC20 would be a high AC for a level 1-4 character? A level 1-4 character typically has +5 to hit (+2 proficiency and +3 stat) resulting a 15+ being required to hit. If you READ the table posted above. The effect of advantage when the target number is 15 is an increase of 21% in the chances to hit which is equivalent to just more than a static +4. </p><p></p><p>To get down to an effective +2.5 you would need to be fighting a creature with an AC of 23 at level 1-4 ... giving a required roll to hit of 18. </p><p></p><p>Over a wide range of AC (in fact almost anything not considered ridiculously high i.e. AC23 at tier 1 ... AC27 at tier 2-3, +5 stat and +4-5 proficiency), advantage is indeed equivalent to a static +4 to +5. THIS is exactly why I posted both the math and the tables since folks seem to have this mistaken impression that the effect of advantage is about the same as +2.5 to +3 which is generally incorrect.</p><p></p><p>Flat bonuses of +4 to +5, in most cases, are the equivalent of advantage. The exception being extremely high to hit numbers which come into play only for EXTREMELY high AC. If you have +10 to hit and the AC of the creature you are attacking is 25 (like a Tarrasque?) then advantage is STILL better than than a static +4. </p><p></p><p>Finally, if you can somehow arrange to get a static +4 on to hit through magical weapons (e.g. +2 bow +2 archery) then advantage ON TOP of this will be the equivalent of an additional +4 to +5.</p></blockquote><p></p>
[QUOTE="Keravath, post: 7523425, member: 6916036"] Unfortunately, your comments are incorrect which is why I posted the table in the first place. Would you agree that an AC20 would be a high AC for a level 1-4 character? A level 1-4 character typically has +5 to hit (+2 proficiency and +3 stat) resulting a 15+ being required to hit. If you READ the table posted above. The effect of advantage when the target number is 15 is an increase of 21% in the chances to hit which is equivalent to just more than a static +4. To get down to an effective +2.5 you would need to be fighting a creature with an AC of 23 at level 1-4 ... giving a required roll to hit of 18. Over a wide range of AC (in fact almost anything not considered ridiculously high i.e. AC23 at tier 1 ... AC27 at tier 2-3, +5 stat and +4-5 proficiency), advantage is indeed equivalent to a static +4 to +5. THIS is exactly why I posted both the math and the tables since folks seem to have this mistaken impression that the effect of advantage is about the same as +2.5 to +3 which is generally incorrect. Flat bonuses of +4 to +5, in most cases, are the equivalent of advantage. The exception being extremely high to hit numbers which come into play only for EXTREMELY high AC. If you have +10 to hit and the AC of the creature you are attacking is 25 (like a Tarrasque?) then advantage is STILL better than than a static +4. Finally, if you can somehow arrange to get a static +4 on to hit through magical weapons (e.g. +2 bow +2 archery) then advantage ON TOP of this will be the equivalent of an additional +4 to +5. [/QUOTE]
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