Grouping up in the East and then West Commonlands will get you great experience.  And it may nullify the pet penalty (if the pet does more damage than the necromancer, he will steal half the exp of the kill).  There is also a slight experience bonus on each additional player you add to the group.  You have another source of income also with bronze weapons and Greater Lightstones from wisps. 
		
		
		
		
		
		
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