Right now on the PTS (Public Test Shard) for your consumption is a new 10-man Raid coming as part of Update 3.6 and called Comet of Ahnket. This will be a Tier 3 raid in keeping with the 20-man Tier 3 Mind of Madness raid but also with this 10-man will be a nice way for the casual player to experience the raid.
They already tried this with the other 10-mans like Intrepid Gilded Prophecy and Rhen of Fate by having three difficulties, easy, normal and hard modes, now they plan to expand on the easy mode by using a new system called Universal Introduction Mode.
What's that you ask? over to Lead Raid designer Dev Anony
Looks good in theory, everyone should be happy, the casual player can start on the new UIM and maybe try Normal after a while, the more hardcore can jump straight into normal and hard mode, sounds a win win for all types of raiders.One thing in particular I would like to invite all of you to test is our new Universal Introduction Mode (replacing our traditional Introduction/Easy Mode which rewards only tokens). Unlike other raids, when this instance is set to Introduction Mode by using the crystal at the entrance, your entire party will be granted 1,600 hit. Additionally, the 'Ascended Odds!' mechanic will become active. Our goal with this is to allow players interested in experiencing new raid content to do so without requiring a full progression to the tier.
This mechanic applies a buff which increases your outgoing damage and healing, and maximum health by 2% per stack for every 30 seconds you are actively engaged in combat. These stacks will persist through death and newly joining members will receive stacks equal to the accumulated total when joining an instance. The stacks will only be removed when you beat the encounter, change the difficulty or reset the instance.