Since Tsih is strongest when her passive is active, the player should always try to get a gift card. The gift card that is technically the best for this task is Metallic Monocoque as it does not drop on KO, does not stop Norma, and out-of-battle damage is reduced with a cost of stars. Price of Power can execute well too, especially early-game.
Despite the star loss caused by it, Unlucky Charm is a very comparable card for Tsih. Like the above-mentioned gifts, it does not drop on KO. It is unique, however, in that it can take advantage of the opponent. Unless the opponent waits for a full hand to discard it, they will likely pass it to another player, and as a result, it can be a quick way for the player to receive a gift card. The player can then either hold the card until they receive a better gift or KO opponents to make up for the star loss.
Any card that causes Tsih to drop cards such as Scrambled Eve, Present Thief, and Flamethrower among others can be used to increase the chance of Tsih losing her gift card is she is currently in possession of one.
While cards like Final Battle and Little War are risky, they can be used to generally good effect against Tsih, as her stats are not conducive to long fights.
Player's should take advantage of Stealth On's indirect attack weakness, and exploit it with cards that go around the protective effect like Oh My Friend, Assault, and Ambush.