Done. Lando is a nice switchin to Groudon/Aegislash while possessing the ability to annoy foes with Intimidate and set Stealth Rock. Unfortunately, it struggles to check threats like Megablaziken, MegaKangaskhan, Zekrom, and Swords Dance Arceus-Normal as it simply does not possess the natural bulk to switch in on these threats more than once. It also has 4MSS, as you want to fit Earthquake, Toxic, SR, Stone Edge, and U-Turn on the same set and it has to forgo one of those moves (probably U-Turn.) This metagame isn't very kind to it, with Will-O-Wisp being everywhere now and the new Ubers both destroying it 1-1. It's still usable, but doesn't last very long vs. offense.
Aromatherapy support is nice with this, especially when Aegislash predicts your switch with Toxic.