Holy Paladin is the only S-Tier healer, and this is due to their kit being so powerful for progression raiding. Pally is a healer that does high amounts of passive damage, has an immunity, and with
Aura della Devozione they can give a large amount of raid-wide damage reduction for important hits. Holy Paladin is a spec that you will likely see in every top composition due to their kit’s unique strengths, and the absence of one of these on any boss encounter would be almost unheard of. In the past you would double up on Holy Paladins on certain encounters, and while that is less prevalent this tier, it still may happen on some fights. They are without a doubt one of the most important healers.
Without their 4-set, Holy Paladin will likely struggle in the throughput HPS department, but once they do gain access to that + double legendary they will be able to pump out reasonable amounts of HPS in raid while bringing the best utility kit for healers in the game.
Santificazione Cinerea may have gotten nerfed, but do not be fooled Paladin is still OP.