This deck is a high-synergy, low-cost, Mid-Range B/W CLeric Tribal. It uses a life-gaining engine to buffer away from Aggressive decks, heavy removal to control Combo decks, and synergistic creatures to act aggressively against Control decks.
Mid-Range Guide to Using this Deck:
Against Aggro: Mulligan if possible for Authority of the Consuls, or Trespasser's Curse. These will help you curve out while keeping the opponent's board under control. Build your hand with creatures, using the card draw possible in Mazemind Tome, and Cosmos Elixer, and Village Rites (for some extra block-sac value) to tutor out a Wrath of God or Baird. Clear Board, and dump your low cost creatures to synergize back to a Win (Angel of Vitality, Cleric of Life's Bond, Vito, Righteous Valkyrie). Phyrexian Obliterator sideboarded as can be useful when playing BO3 against aggro.
Against Combo: This deck leans combo-splash-control more than anything else, so more often than not, playing another combo deck is going to be a walk in the park. I usually curve out normally, looking to start my hand with this deck's creature sweep (Cleric of Life, Righteous Valkyrie, Vito, Angel of Vitality) and some removal such as Mortify, Wrath, or Banishing Light. Wait for the combo to start working it's way out and flush it out with your removal, retaining the heavy life gain to push out Righteous Valkyrie's +2/+2 effect.
Against Control: I find Black and/or Red Removal to be the most difficult to face for this deck. Blue Control can usually be aggro-d around with the low cost of this deck, as long as you can pull it off in time, keeping in mind to watch for mana-saved for counterspells. However, the cheap removal spells for low toughness creatures that both black and red have to offer, and the graveyard revival abilities of black to be hard on our low cost creatures. This is something I am open to feedback on for improvement of this deck Generally speaking though, the goal here is to play as much as you need to draw the game out as long as possible. There is limited card advantage available to red, black removal has a difficult time outlasting us if we play a heavier white game (lifegain, exile, board wipe). Vito and Exquisite, or Vito and Revenge are your bestfriends in a sticky situation.
This deck definitely runs short on the average land count, but as it is low-cost, I don't often find myself needing more than 4 in most cases. I generally play all my decks light on lands, as this is my play style, using card advantage techniques to tutor this problem out if needed. Thanks for reading!