[kmonster]

Originally Posted by tristanzz

I am flummoxed, bamboozled, and perhaps even slightly confused over how many hitpoints multiclass characters gain. When it levels, a single-classed Fighter, Ranger, or Paladin gets d10+Con Bonus. Multiclass characters behave strangely.

Testing level advancement on a Mage/Thief with 16 CON (giving the maximum allowed bonus for non-martial classes) yielded the following MAXIMUM hitpoints possible for each increment of leveling:

Thief	Mage	Exp		Max HP
3	2	2,500		17
4	3	5,000		24
5	4	10,000		31
6	5	20,000		38
7	6	40,000		45
7	7	60,000		49
8	7	70,000		52
8	8	90,000		56
9	8	110,000		59
9	9	135,000		63
10	9	160,000		66
11	9	220,000		69
11	10	250,000		73
11	11	375,000		77

No effing clue what the logic is behind these values. It's some kind of average, but I can't figure out the formula. I even consulted my brother's copy of the 1977 AD&D Players Handbook (no collectible value, we colored in it when we were kids ) and the official rules do not appear to produce these values.

Your thief/mage gets 3 (=6/2) HP when leveling up as thief and 4 HP (=4/2+2) when leveling up as mage. I suspect that's because you have 16+ con and get the +2 HP con bonus when the second class reaches a level.