End game grouping ?

Hi guys, I'm back with my bro but we haven't played since the release of the samourai class.

We are casual player who probably won't raid. I'm wondering if these is any kind of single group content to progress on ? As I get it, grouping content barely need a healer so I'm wondering if their is various difficulty for these dungeon ?

There are not various difficulties for dungeons. There are additional difficulties for trials and raids known as extreme and savage, but these require 8 people unless you are doing older ones with the Unrestricted setting.

There will be a new kind of content releasing over the next year or so that will include 3 dungeons that can scale the way you described. We don't have a lot of details about them yet. Deep dungeons such as Palace of the Dead and Heaven-on-High can be done with a different amount of players and any composition. The highest floors become very challenging.

You each get separate quests for things but most of the content to complete those quests can be done as a party. If you just want it to be you and 1 other, you could queue for specific dungeons with the Unrestricted and Level Sync settings but they will be a lot harder with only 2 people unless you disable Level Sync. Most content is intended for 4 or 8 players.