I am only level 16 dungeoneering, and am just wondering what the fastest xp is. I basically know nothing of the skill so i'm not sure what floor, complexity, etc. I should be doing. Any help is much appreciated thanks.

People are going to have a hard time advising you until you get more educated about how the skill works overall.

 

Fortunately, your timing is good.. after a full month of work, I just posted a very comprehensive guide to the Dungeoneering skill. It has everything you need to know: http://www.runescoop.com/html/rs_TheRuneScoopUltimateSkillGuideDungeoneering.htm

 

Start with the Core Concepts section and proceed from there; feel free to post any questions.