Huh, also soweit ich weiß, geben Gegner keine Xp, die auf die Gruppe aufgeteilt wird, sodnern einfach "Global XP", d.h. jeder Char bekommt die gleichen EP, unabhängig davon, ob er in der Gruppe ist oder nicht.
Ich müsste es mal ausprobieren, um es zu testen, aber es würde wenig Sinn machen, da man gegen Ende der Kampagne ohnehin Stufe 20(cap) erreicht hat 
Habe jetzt folgendes gefunden:
While Obsidian has stated that NPCs, summons, familiars, and animal companions do not affect earned Experience Points, this is not entirely true. Summons, familiars, and animal companions are not counted in the calculation for earned Experience. However, the party's average character level (not ECL) is used to determine earned Experience for an encounter. This has a profound impact on high ECL races as they will cause the party to earn accelerated experience points during play because they bring the party average level down.
Example 1: A Human Wizard of 7th level is adventuring with Khelgar Ironfist (only) and encounters a Bladeling. The Bladeling has a Challenge Rating (CR) of 1. The party's average level is 7. This happens because NPCs have the same XPs as the PC, thus making Khelghar (a Dwarf Fighter) also level 7. The earned experience for this encounter is 17 points for every character in the party regardless of their condition upon earning the points (i.e., dead or alive).
Example 2: If the same Wizard above had Neeshka instead of Khelgar Ironfist, she'd be a level 6 Rogue (because she's a Tiefling and thus has an ECL of +1). The average party level is thus 6.5 which is rounded down to 6. This results in 19 points of experience for every character in the party for the encounter.
Temporary NPCs such as the 2nd level Fighter in the Neverwinter crypts during the Temple of Tyr quest highly impact the party's average level. Thus, it's advantageous to have such party members in the group to obtain more experience points during combat.
sieht also nicht so aus, ob die anzahl der NPC in der Party einen Unterschied machen würde.... das durchschnittliche Level aber sehr wohl.

Originally Posted by
Klingenwirbler
"Ey, wo zum Teufel steckt Neeshka schon wieder? Die soll hier gefälligst mal die Fallen entschärfen!".

Ich sag nur Khelgars Kommentar, wenn man den "Emote" Pick Lock ausführt:
"Blasted Lock needs to be picked!"
Da höre ich wiederum dann immer in meinem Kopf "Well, well, well, looks like this lock needs some special attention..."
Aber zurück zu den Fallen.... problematisch wirds, wenns eine "Giftwolke"-Falle oder etwas vergleichbares ist.... wenn du nicht weit genug hinten warst und einen Windstoß parat hast, dann wirds ekelhaft >_<