I have been testing an anti-anti-lead Donphan, for quite some time. Paired with Xatu or Espeon support, it knocks other anti-leads out of the park.
Donphan @ Earth Jewel
Ability: Sturdy
Evs: 252 HP 252 Attack 6 Defense
-earthquake
-ice shard
-stone edge/rock slide
-seed bomb
The main idea of the set is to pound hard with earthquake STABed and the ground jewel boosted, and kill off anything without a focus sash, and if they do have it then all I have to do is ice shard. If they try to hit me even with a powerful special attack I will always survive with 1HP, to live a turn and hit them with earthquake. This comes at the exception of leads that actually set up, becuase then all you do is switch into Espeon or Xatu, and bounce rock spikes or even taunts back at them. Ground offers amazing coverage, with only grass and bug resisting and flying and levitating immune. And grass types are seldom leads and, if they are they are usually poison to. As with bug types like scizor with its secondary steel typing. And flying types can be delt with with stone edge or rock slide. Stone edge is poweful, but its dam annoying to miss a hit and then die, thats why rock slide is an option. Seed bomb is mostly filler, possibly hitting water types harder.
It is not without its problems though. Donphan must switch out on multi-hit attackers, and can do nothing to things with levitate or possibly baloon. Also if they predict earthquake and switch into lets say tangrowth, earth jewel is used and Donphan has no item. If you are forced with switch Donphan too it rarely works into your team acting as a deadweight.
The evs and nature are pretty straight forward. Maximize attack to hit hard then HP to possibly take any hits. Remember sturdy is there only for special attackers, Donphan can still tank is needed.
I have also been considering soft sand here as an item, but you do lose important power. But then again you still have an item afterwards to increase attack a bit.
Looking for some constructive critism here.