A really handy tip with vs Chandelure, is that you don't suffer any chip damage off his long range attacks. Even his buffed attacks. So just be patient and block as you work through his attacks. Through this, work on figuring out his animations, and what move does what. Some of Chandelure's long range attacks can actually pierce your counter; so I don't recommend counter dash canceling often.
Once you download his moves, you'll know how to react, and you'll force the Chandelure player to try different tactics to eat at your health. Use this opportunity to capitalize on their panic.
Outside of Chandelure, master the counter dash cancel mechanic. Very, very essential to higher level play, and makes most projectiles a joke. Some Pokemon also have stronger projectiles that cancel out others, so you'll have options the more you play.
