If one is dipping to crab... I strongly suggest Mountain does not fall. If you opponent is first player, this card is amazing, otherwise its simply good. Play it after committing a Voltron on defense, so you can then attack back with the same monster. Mountain does not fall x3 and reprieve x3 both work.
New Northern Wall Sensei should help out significantly with helping stop cards from attacking the Voltrons.
Indeed, both cards have performed amazingly well. Reprieve is so much better every time I play, 50% times being free thanks to Daimyos Favor.
Playing against more control decks, I have found that Glory 1 characters can perfectly hold their ground Dishonored if they are packed with items. The only assasinates I fear is when heavily investing into Agasha Swordsmith with Way of the Dragon, but Reprieve or Above question solves it. The rest of the time, 1-2 costers are baits. The real stuff goes into cost 3+ characters.
Raitsugu is a monster. Packed with 2 Kazues and 2 Tetsubos in the deck, once one of them hits the board, he is a defense gun turret. Even if opponent manages to bow it, it still clears most of the opponent's boards (way of the dragon doubles the mayhem) with no problem. I usually keep my Let Go for possible Pacifism and Cloud the mind, since such a beast fears no katanas.
Playing the long game has won me the last 4 games in a row. In the end, it's a matter of tempo and forcing your opponent waste his resources and spend honor on cards, while every attachment you play will be on the board for 2-3 turns or more. I need to try it further against Scorpion and Fenix, and see if it still works.