This is the Best Priest Deck August 16 Season 29 ladder climb. It’s the list Zetalot used to reach legend in season 28 and with all the same cards it’s still a strong deck.
This list plays out by controlling the board with removal and the strong AOE spells while sending your deathrattle minions to the graveyard to be brought back by N’Zoth for insane value.
Priest is struggling in the current META. The release of the new adventure on 11th August, One Night in Karazhan might change this. But until then, this is the most effective list and it’s more than capable of taking you to legend. Good luck.