Free-to-play Dungeoneering Training

Dungeoneering training is pretty self-explanatory.

Parties Vs Soloing
Parties will tend to complete the floor quicker than soloing, its wether you think speed is worth losing a small amount of XP. although it is usually best to only have a group of 2-3 people as puzzle rooms will be much harder, unless you are sure your team-mates intelligence is up to scratch then you could have a party of 5.