The issues you point out about the flaws of Pure Paladin are correct in the fact of devolving missiles, this is because you lose buffs and libram’s of wisdom in the process. However, Pure paladin can clear the board using a combo of Libram of Justice and Consecration. it is also a good board clear as it only targets enemy minions and Libram of Justice is often discounted from Aldor Attendant and Aldor Truthseeker. the final part is false because the two cards that only trigger if the deck is Pure Paladin aren’t the strongest cards in the deck. they are far outclassed by Libram of Wisdom. Bomb Warrior and Highlander Priest are both bad matchups for the deck because they are able to clear the board easily and destroy minions easily using things like Coerce and Shadow Word: Death