(Psi)SeveredHead said:
So now the problem is too high AC? I rarely see monsters with challenging ACs. We should use lower level PCs (eg 10th and 15th) - there are so few CR 20 monsters that their rarity skews the numbers.
Well, some quick and dirty numbers for 10th level. Assume standard wealth value of 49,000 gp, of which about half is spent on offensive equipment.
Let's say the 10th-level monk has the following:
1. Strength 18 (starting Strength 14 and
+4 girdle of giant strength: 16,000 gp)
2. +1 enhancement bonus from
+1 amulet of mighty fists: 6,000 gp
His full attack with flurry of blows is +12/+12/+7
Let's say the 10th-level fighter has the following:
1. Strength 22 (starting Strength 16, 2 ability increases and
+4 girdle of giant strength: 16,000 gp)
2. Weapon Focus and Greater Weapon Focus
4.
+2 weapon: 8,000 gp
His full attack is +20/+15
A quick survey of the CR 10 creatures in the SRD gave me the following:
AC 28: Formian Myrmarch
AC 26: Adult White Dragon
AC 24: Juvenile Red Dragon, Gargantuan Monstrous Scorpion
AC 23: Fire Giant
AC 22: Bebilith, Clay Golem
AC 21: 11-Headed hydra
AC 18: Noble Salamander
AC 11: Colossal Animated Object
As expected, the monk fares comparatively poorly against the high-AC creatures such as the Formian Myrmarch and the Adult White Dragon, getting 0.55 hits per round of flurrying against the fighter's 1.05 hits per found of full attack against the Formian Myrmarch (about 52%) and 0.8 hits per round to the fighter's 1.25 hits per round against the Adult White Dragon (64%).
Against the middle range of AC between 24 and 21, the monk starts to catch up. He gets 1.1 hits per round against the fighter's 1.45 against AC 24 (about 76%) and 1.55 hits per round against the fighter's 1.7 against AC 21 (about 91%).
Against creatures like the Noble Salamander and the Colossal Animated Object, the monk actually gets in more hits on average, 2 hits per round against the fighter's 1.85 against the Noble Salamander (about 108%) and 2.75 hits per round against the fighter's 1.9 against the Colossal Animated Object (about 145%).
So, for a party that includes the 10th-level monk and the 10th-level fighter above, the fighter will look good when the opponent has an AC of 26 and above, the monk will look good when the opponent has an AC of 19 and below, and against opponents with AC between 25 and 20, the fighter will do slightly better than the monk, but not so much better that the monk feels useless. After all, he still has other abilities to compensate.