re: What's the key to defeating Lynels in BoTW?

My strat was to always glide in from above and land as many headshots as I could before landing. When he's down, start the charged swing with your strongest two-handed weapon. After that, it's all a matter of parrying/dodging their attacks. When they launch fireballs, if you've got grass or plants nearby, that'll create another updraft to jump and glide again for another round of headshots and another spin attack. On silver-lynels, usually ends them quickly. Golden Lynels, a bit more time. With the golden lynels, I've started avoiding the ones with the clubs completely.