>>23074693Glare is fine, you use it on stuff that resists all of your moves and probably can't one-shot you. As for Latias? Serperior doesn't have the bulk, even with investment, to tank a Draco Meteor.
252+ SpA Latias Draco Meteor vs. 0 HP / 0 SpD Serperior: 217-256 (74.5 - 87.9%) -- guaranteed 2HKO
0 SpA Latias Draco Meteor vs. 0 HP / 0 SpD Serperior: 159-187 (54.6 - 64.2%) -- guaranteed 2HKO
If you're running life orb, and you should be, you will have already taken a little damage, so it might kill you. You'll only really survive if you're mostly unharmed or if it's purely a support Latias.
But maybe I'm mistaken... Serperior has a hard time with the jet dragon too.
2 252+ SpA Serperior Dragon Pulse vs. 252 HP / 0 SpD Latias: 226-266 (62 - 73%) -- guaranteed 2HKO
+4 252+ SpA Serperior Dragon Pulse vs. 252 HP / 0 SpD Latias: 338-398 (92.8 - 109.3%) -- 56.3% chance to OHKO
+6 252+ SpA Serperior Dragon Pulse vs. 252 HP / 0 SpD Latias: 450-530 (123.6 - 145.6%) -- guaranteed OHKO
You need to be at max Leaf Storm power to OHKO it. So, maybe you could go bulky if you want. It's your Serperior. Go nuts.