Harloff - 4/6/2006 2:12 PMMy guess is that the max exp you can get on each level per creature (the level constant orth is talking about) this max influences the exp given when the ECL is taken into account and has the above described effect.
orth - 4/6/2006 10:25 PMParty size, average level, deviation to average level, ECL, summons/familiars, creature CR and a per level constant are all factors in XP equation.
feniox - 4/6/2006 1:11 PMI never remembered it being so difficult to level them (not that this is my main priority, it isn't) but I wanted to check if: