I'm currentaly levl 54 dungeoneering and I want to get a chaotic weapon for slayer. I want to know which complexities and sizes would get me the fastest exp. I really don't know how to do each level since 90% of my dung exp was from tears of guthix and the resoure dungeons. Also, I prefer to solo dungeons.

If you're just doing solo:

Rush all floors up to (max floor - 5). For a rush, set it to c1 and ignore any monster you don't have to kill. Once you find the boss, prep and kill immediately.

For the last 5 or so floors, do c6 mediums.

 

You should really find a team or at least a buddy though. Having even just one other person to team monsters or key makes dungeons clear faster and gives you 5% more xp.