Double Team + Brightpowder breaks evasion clause, and that clause is often in play.
Excadrill is an Uber Pokemon, just so you know. and you'll have to make do with something else, like Heatran:
-Fire Blast
-Earth Power
-Hidden Power (Ice/Grass)
-Stealth Rock/Flame Charge/Taunt/Substitute
Nature: Modest/Timid
EVs: 252 SAtk/4 SDef/252 Spe
Item: Air Balloon/Life Orb
or
-Lava Plume
-Will-o-Wisp/Toxic
-Stealth Rock/Roar
-Protect
Nature: Calm
EVs: 248 HP/252 SDef/8 Spe
Item: Leftovers
Virizion's Speed IV doesn't have to be 30 for its Hidden Power to be Ice; here are a couple more HP Ice IV spreads with a 31 Speed IV: 31/30/30/31/31/31 and 30/31/30/31/31/31.
For Rotom's Hidden Power to be Fire, it can't have a perfect Speed IV; it has to have a 30 Speed IV instead. Here are the legal HP Fire IV spreads: 31/31/30/30/31/30 and 31/30/31/30/31/30.
In Sandstorm, Gliscor can use this set for some evasion hax and more power. Defensive Poison Heal Gliscor is still viable too, though:
-Swords Dance
-Earthquake
-Acrobatics
-Substitute
Nature: Adamant
EVs: 4 HP/252 Atk/252 Spe
Item: Flying Gem
Ability: Sand Veil
-Let me start by saying thank you so much for the effort you put into this response, it was extremely well thought out and I appreciate the insight.
-Rotom's spread was a typo so that problem is out of the way.
-Excadrill's move to ubers was brutal (literally happened the day I bred her and she was my first successful RNG :() and while I would love to make the switch to Heatran, there are a few concerns I have with the idea: 1. I am clueless on how to RNG in DPP. 2. Doesn't that leave me with no physical attacking options and two stealth rock users?
-I am not overly concerned with Virizion because pokemon are often rounded to level 50 making those values insignificant. Plus even at level 100 I doubt the point makes much of a difference unless it means missing the speed tie with opposing virizion.
Sorry for the delay!
Now DW Sandslash is released you can use that over uber Excadrill.
Sandslash @ Leftovers / Life Orb / Passho Berry
252 Atk / 252 Speed / 6 HP
Trait: Sand Rush
- Swords Dance
- Earthquake
- Stone Edge
- X-Scissor / Rapid Spin
Anyway, be VERY careful of Amoongus now its Regen ability has been released because it effectively walls your whole team. A simple Spore/HP Ice/Clear Smog/Giga Drain set causes this team all sorts of issues and the only thing that stops it aka Reuniclus is put out of commission by Spore. You also cannot handle CB Haxorus because it destroys you. To solve both issues id suggest a Skarmory over Virizion. If you find this opens you up more against rain a Latios would go over Reunicus. Skamorys Spikes also wear down Latios and Sandslash's checks well. Skarmory and Latios also cover your horrendous Tech Loom weakness (who has also Recently been released).
Anyways Sub Toxic Gliscor is really awful now, ive not seen it work since...well ever actually lol. Sub SV Glis or Toxic Orb SD are much better and less useless sets.
^^^ What do you think about a Heatran in place of Excadrill if I can manage to get my hands on one? Wouldn't that effectively check a majority of the threats you listed above?