Same reason as with non-humans! Ditto (pre-UA) ability-score requirements: a prejudice against proliferation, extreme at exceptionally high levels.What? Can't humans be those classes? Doesn't stopping assassins at 15th level defeat the "humans can advance infinitely in their chosen class" concept of game balance?
And why DID assassins, monks, and druids cap at 15/17/14, but illusionist, paladin, and ranger NOT cap? (I can see fighter, cleric, magic-user, & thief, but why some sub-classes and not others?)
Lift the caps if you like. The Great Druid and Grandfather of Assassins require (besides the trial by combat) only 1,500,001 XP -- the same as a 14th-level fighter or magic-user. Unearthed Arcana takes druids up to 23rd level (Hierophant of the Cabal) via something sort of like the bardic colleges. For assassins, one might try +500,000 XP per level, a 16th HD (Hidden Imam?) and +2 HP per level thereafter. Higher levels of monk could also be +500,000 XP for +2 HP. (These are just off the cuff.) Good luck rolling a bard in the first place; I think 23rd (on top of the fighter and thief levels) is plenty!
Last edited: