Hail of Arrows is your board-wide squeeze: play it when your hand is deep and the table is short on Defense, and one shot chips several players at once. It suits anyone closing on multiple low-HP targets, or Rebels clearing the way before swarming the Lord. Remember it hits everyone — allies included — so fire it when your side is healthy or still holding Defense.
Pair it with คนเถื่อน (Barbarian Horde) in the same turn to drain both Attacks and Defenses until every hand runs dry. Strip a key defender's ป้องกัน (Defense) with ปล้น (Steal) or ทำลาย (Dismantle) first, then fire. In หวงเยว่อิง (Huang Yueying)'s hands it's brutal — her genius skill draws a card each time she plays a trick, so the arrows never stop.
The best answer is ปัดป้อง (Negate), which cancels the entire card for the whole table at once. Otherwise keep a ป้องกัน (Defense) in hand instead of dumping it, or wear แปดเหลี่ยม (Eight Trigrams) for a chance at a free block. As เสียวเกี้ยว (Xiao Qiao), just transfer the 1 damage onto someone else.