Hi all,
I checked the history of the 4 man leaderboards. I wanted to summarize and give highlights of the available information. As we know, greater rift clears of 4 man groups are significantly higher than solo players. As such, inclusion in the 4 man meta greatly increases that classes ability to get higher level legendary gems as well as XP/paragon levels.
Please find below the classes and seasons which they are part of the dominant 4 man meta.
Barbarian
4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,19*
Crusader
1,2,3,4
Demon Hunter
1,1,2,2
Monk
4,4,5,6,7,7,8,8,9,9,10,11,12,13,14,15,16,17,18,19*
Necromancer (Introduced Season 11)
11,12,13,14,15,16,17,18
Witch Doctor
1,2,3,5,6,7,8,9,10,11
Wizard
3,3,10,12,13,14,15,16,17,18,19*
Since season 4, two classes (barbarians and monks) are always part of the 4 man meta.
No crusader or demon hunter has been part of the four man meta after season 4.*
The four man meta in terms of class composition has not changed since season 12 where it is Barbarian, Monk, Necromancer and Wizard.
I think these observation suggest that there needs to be a significant overhaul to encourage greater class diversity in the 4 man meta.
*In season 19, the pandemonium buff led to a different top 4 man meta (Wiz, B, B, M) in comparison to non-seasons (Wiz, C, B, M).