always go for x4/x5 if you can, otherwise pick the match that suits your situation best! e.g.
1) if there are 1 or more attack/sp attack tiles around, prep yourself with a def and/or counterattack tile
2) if there’s only 1 attack/sp tile, you can either just use the tile so your opponent won’t have any, or also do def/counterattack
3) watch your health and energy :)
 "Achievement Unlocked"){kind=icon}
 "Civiballs 2"){kind=icon}
 "Kingdom Rush Frontiers"){kind=icon}
 "DJManiax"){kind=icon}
 "Super Crazy Guitar Maniac Deluxe 3"){kind=icon}
 "Music Catch 2"){kind=icon}
 "Music Catch"){kind=icon}
 "BioGems"){kind=icon}
 "Super Crazy Guitar Maniac Deluxe 2"){kind=icon}
 "Factory Balls 4"){kind=icon}
 "SCGMD4"){kind=icon}
 "Epic Combo!"){kind=icon}
 "Achievement Unlocked 2"){kind=icon}
 "Vector Stunt"){kind=icon}
 "Treadmillasaurus Rex"){kind=icon}
 "A Dance of Fire and Ice"){kind=icon}
 "Kana Warrior / かなウォリアー"){kind=icon}
 "The Light Temple"){kind=icon}
 "Lightbot 2.0"){kind=icon}
 "Diamond Hollow"){kind=icon}