The thing is, it's still useful even if the opponent runs Magnezone. Skarmory's job is to block physical attackers, and even without leftover recovery, it can still pull that off, as It did to your Tyranitar. It also set up spikes whenever possible, and phazed unfavorable match-ups. If it gets KOed, it becomes a problem unless you have something else that can take physical hits.
yeah that skamory was sooooo annoying latias is max speed max hp im pretty sure i woulda won no matter what. i was worried for a while though. good battle. i assume your internet cut out at the end, meh its not as if i was gonna save that, took wayyyy to long