Moongeist and Sunsteel Strike are 4x resisted by Mega-Sceptile though... Unless the user is immune to Electrify such as Alolan Marowak. Aren't all Ground types Immune to Electrify? Regardless, any Scarf Levitate, Flying-type or simply a faster Pokémon with Air Ballon, or any Contrary used won't lose Speed due to Sticky Web. Contrary users like Serperior even get a Speed Boost so if it uses Draco Meteor it can KO Mega-Sceptile. Landurus is part-Flying, so Sticky Web wont affect it, on a Scarf set (give it Flying STAB like Dragon Ascent) can counter Mega-Sceptile. Excadrill with its ability under Sandstream (assuming no Sticky Web) can go first: give it Bug or Ice coverage like Life Orb Mega Horn and you can KO. Don't forget about Leech Life Triage, Dragon Ascent Gale Wings, Taunt / Gastro Acid / Substitute Prankster, Trick Room, and Ground-types that are immune to Electrify. In fact, if you Outspeed with a Faster Skill Swap user, you get +1 SpA. Also set-up moves Agility or Z-moves will let you go first next turn. Phaze moves that don't inflict damage should be fine, (Roar affects Ghosts). Heatran, for example can set up Sub on Mega Sceptile and avoid Electrify.