Tessarael
Adventurer
Here are the attacks:
+15/+15/+15/+10/+5 - Monk 20 Flurry
+13/+8/+3, +13/+8/+3 - Monk 20 TWF
+13/+13/+13/+8/+3, +13/+8/+3 - Monk 20 Flurry + TWF
Let's assume a Flaming Quarterstaff +5 wielding Monk with Strength 22, so damages of:
2d6+5+6 = 18 avg in main hand
2d6+5+3 = 15 avg in off hand
I'm going to ignore criticals and assume opponent ACs of 16, 21, 26, and 31.
vs AC 16 opponent:
96.75 damage from Flurry + TWF
76.5 damage from Flurry only
64.35 damage from TWF only
vs AC 21 opponent:
63.0 damage from Flurry + TWF
54.0 damage from Flurry only
39.6 damage from TWF only
vs AC 26 opponent:
34.2 damage from Flurry + TWF
32.4 damage from Flurry only
19.8 damage from TWF only
vs AC 31 opponent:
13.65 damage from Flurry + TWF
15.3 damage from Flurry only
8.25 damage from TWF only
Flurry is clearly better than two-weapon fighting (TWF). Is it unbalanced? Let's compared to the TWF scenario, but now let's make it a 20th level Fighter instead, with attacks of +18/+13/+8/+3 and +18/+13/+8 with TWF:
89.7 damage vs AC 16
67.05 damage vs AC 21
40.5 damage vs AC 26
20.7 damage vs AC 31
In my opinion, the 20th level Fighter should be better. I don't like the fact that the TWF/Flurry Monk comes out better at AC 16. Other than that, 20th level Monk TWF/Flurry doesn't seem overpowering compared to a 20th level Fighter.
+15/+15/+15/+10/+5 - Monk 20 Flurry
+13/+8/+3, +13/+8/+3 - Monk 20 TWF
+13/+13/+13/+8/+3, +13/+8/+3 - Monk 20 Flurry + TWF
Let's assume a Flaming Quarterstaff +5 wielding Monk with Strength 22, so damages of:
2d6+5+6 = 18 avg in main hand
2d6+5+3 = 15 avg in off hand
I'm going to ignore criticals and assume opponent ACs of 16, 21, 26, and 31.
vs AC 16 opponent:
96.75 damage from Flurry + TWF
76.5 damage from Flurry only
64.35 damage from TWF only
vs AC 21 opponent:
63.0 damage from Flurry + TWF
54.0 damage from Flurry only
39.6 damage from TWF only
vs AC 26 opponent:
34.2 damage from Flurry + TWF
32.4 damage from Flurry only
19.8 damage from TWF only
vs AC 31 opponent:
13.65 damage from Flurry + TWF
15.3 damage from Flurry only
8.25 damage from TWF only
Flurry is clearly better than two-weapon fighting (TWF). Is it unbalanced? Let's compared to the TWF scenario, but now let's make it a 20th level Fighter instead, with attacks of +18/+13/+8/+3 and +18/+13/+8 with TWF:
89.7 damage vs AC 16
67.05 damage vs AC 21
40.5 damage vs AC 26
20.7 damage vs AC 31
In my opinion, the 20th level Fighter should be better. I don't like the fact that the TWF/Flurry Monk comes out better at AC 16. Other than that, 20th level Monk TWF/Flurry doesn't seem overpowering compared to a 20th level Fighter.