Here is a simple Magic Archer King Tower Activation using the Ice Spirit, courtesy of the Season 10 balance changes (https://i.imgur.com/0NYASjf.jpg).
It is now a lot easier to activate the king tower against the Magic Archer, because of the range decrease (7 to 6). I decided to show an example against a Magic Archer played behind the opponent’s king tower. Note the exact tile placement: 2 tiles away from the cornermost princess tower tile. Also note the timing, which is a little precise. You can perform this with most troops, though the Ice Spirit is the most cost-effective method. Ice Golem can negate all princess tower damage, however. You used to be able to do this with a Log + Ice Spirit, but you don’t need a Log anymore. This change will definitely affect Magic Archer’s utility, and opponents will need to be a lot more careful when using him!
In this clash royale video I showcased a trick using the clash royale 2.9 Xbow cycle deck. This deck has the clash royale xbow and tesla building defense as well as the clash royale cycle cards for quick defense and mechanical gameplay. This is currently a very strong but high skill-cap clash royale deck. In this video, I showcase a clash royale King Tower Activation against the clash royale Magic Archer card. Thanks to the season 10 clash royale balance changes, it is a lot easier to activate your king against this card, as it has less range. You can perform this activation with most troops; in this video I used the clash royale ice spirit, which is only 1 elixir. Activating the king tower will help with a variety of decks that use Magic Archer, such as P.E.K.K.A Bridgespam, or Miner Wallbreakers decks. I hope this clash royale short trick will help supplement a better understanding for your 2.9 Xbow fundamentals, and have a great day :). Thank you for watching my video!