I think the opposite actually.
Sadhu 2 is slightly more boring because you basically only have possession for damage. Itās also slightly more annoying to play because possession can get cancelled then youāll have to wait 20 seconds.
Paladin 3 gets Smite and Conviction which are usually better to use killing weaker mobs. The lower cooldown and overheat charges on both Smite and Conviction makes it a lot better for doing quests.
Of course both builds will get Cure and Heal to also deal damage, so Iām not comparing those skills.
Sadhu 2 is better for party play (in dungeons, for example), while Paladin 3 is better for soloing IMO.