Purj is essentially correct there are ways to avoid most all XP not from completing quests and exploration. It also took a Lot more XP to level up. Generally for dungeons like WC I just ran inside and waited by a certain spot of the wall near the entrance that was geographically close to the final boss, the high level character then ran by all the unimportant mobs (and when he made the jump they all lost aggro) and killed just the final boss and looked at the loot, at which point with group loot on the twink was able to roll need against the high level who passes and walk out with exactly 1 boss worth of XP. For other dungeons like deadlines you just walk in, wait till the high level cleared everything up to first boss (which was too far away to get xp or loot), move up, repeat, and finally be in range for final boss to get loot. Dying if needed to reduce even the 1 mob XP was doable but rarely worth any trouble.