Dragon's Lair

Facet of Light
Monk

Skills:
 * Shield of Regeneration
 * Signet of Devotion
 * Guardian

Facet of Nature
Ranger

Skills:
 * Pin Down
 * Concussion Shot

Facet of Chaos
Mesmer

Skills:
 * Diversion
 * Ether Feast
 * Mantra of Recall

Facet of Darkness
Necromancer

Skills:
 * Parasitic Bond
 * Blood Renewal
 * Grenth's Balance
 * Unholy Feast

Facet of Elements
Elementalist

Skills:
 * Lightning Surge
 * Crystal Wave
 * Aftershock
 * Shock

Facet of Strength
Warrior

Skills:
 * Power Attack
 * Healing Signet
 * Gladiator's Defense

Bonus
After you meet Glint, do not go through the portal. Instead, pick up a dragon egg. Glint will attack you. Kill her to complete the bonus. Even if you attempt the bonus and fail, you still get credit for the mission. Helpful Tips
 * Right when you start the battle, Glint will cast a hex that causes exhaustion every time a skill is used. Anyone who can should bring any hex removal like Shatter Hex or Smite Hex.  Because this is an AOE hex, your entire party will be hit.  Also try to stand apart from each other if possible.
 * Bring Throw Dirt or Dust Trap for the Ranger or Blinding Flash for the Elementalist
 * Glint's attacks can be dodged like arrows
 * There should be a Warrior that is a very good tank.
 * A protection Monk is useful for limiting Glint's huge attack damage.
 * Everyone should bring a Resurrection Signet