And i need to give reason to MyCombobestCombo, Umbra is the absolute nuts in this deck and Tarim is probably in the top3 bests standard legendaries so it’s auto-include in all paladin decks.

Actually in this deck thekal and Uther are more core than Shirvallah. It’s harder to reduce shirvallah compared to OTK paladin because Call to Arms helps a lot to do it (5-mana spell and filter your deck in order to find other big spells)
And it’s important in some matchs up to go higher than 30 HP (Mainly against All priests but topsy and deathrattle hunter or cubelock because that give you time to do developing plays)
Shirvallah is a kind of “win more” cards, i often play it when i’ve already won the game.