I was messing around with defensive clamper set, and it survived a leaf storm for a specs mega sceptile:
252 SpA Choice Specs Sceptile-Mega Leaf Storm vs. +1 252 HP / 252+ SpD Deep Sea Scale Clamperl: 236-282 (86.1 - 102.9%) -- 18.8% chance to OHKO
+1 clamperl because eviolite boost, which I...