EDIT: This post is mostly for no-dmax, in d-max ladder Sash is much more useful to stop sweeping d-max mons.
This may seem controversial, but I think the sash threshold is too high. There are many Pokemon that are quite bulky that for some odd reason can get sash if they are the lead, or Pokemon weak to Stealth Rock that would perform better with HDB.
Garbodor - One of the best examples. Garbodor has 80/82/82 bulk which isn't anything to sneeze at. It has only two weaknesses and it can reliably live Super Effective STAB Ground and Psychic attacks granted they do not meet the above conditions. It can even live Leftovers Lando-T Earthquake, and has a 25% chance to live the LO boosted one.
Examples:
Lvl 82 84 SpA Life Orb Sigilyph Psychic vs. Lvl 86 84 HP / 84 SpD Garbodor: 234-276 (84.1 - 99.2%) -- guaranteed 2HKO
Lvl 84 84 Atk Sandaconda Earthquake vs. Lvl 86 84 HP / 84 Def Garbodor: 218-258 (78.4 - 92.8%) -- guaranteed 2HKO
Magmortar - One of the mons that accentuates how Sash for some reason has priority over much more useful items such as HDB. The only reason you should be sacking a Pokemon with good special attack and coverage in the first two turns is if you have to stop a set-up, or you're psychic and you know that they don't have any other Pokemon in the back that wouldn't like to be hit by a 125 Base Sp. Attack Fire Blast/T-Bolt/Focus Blast or Earthquake.
Focus Sash is still a really good item, but it needs some exceptions in the rule to account for Pokemon that are actually bulky (by perhaps lowering the threshold) or by having Focus Sash specifically not be put on Pokemon weak to Stealth Rock in a metagame where hazards are much more common than hazard control. Focus Sash is also a bit of a "noob trap" item that takes advantage of your opponent not knowing about your coverage moves for it to work effectively. You will notice the higher up in ladder you go, the less useful focus sash is.
Additionally, Focus Sash in Randbats is weaker than it is in other metagames because you have to scout the opponents team and Pokemon are bulkier and don't hit as hard due to even EV spreads.
This may seem controversial, but I think the sash threshold is too high. There are many Pokemon that are quite bulky that for some odd reason can get sash if they are the lead, or Pokemon weak to Stealth Rock that would perform better with HDB.
Garbodor - One of the best examples. Garbodor has 80/82/82 bulk which isn't anything to sneeze at. It has only two weaknesses and it can reliably live Super Effective STAB Ground and Psychic attacks granted they do not meet the above conditions. It can even live Leftovers Lando-T Earthquake, and has a 25% chance to live the LO boosted one.
Examples:
Lvl 82 84 SpA Life Orb Sigilyph Psychic vs. Lvl 86 84 HP / 84 SpD Garbodor: 234-276 (84.1 - 99.2%) -- guaranteed 2HKO
Lvl 84 84 Atk Sandaconda Earthquake vs. Lvl 86 84 HP / 84 Def Garbodor: 218-258 (78.4 - 92.8%) -- guaranteed 2HKO
Magmortar - One of the mons that accentuates how Sash for some reason has priority over much more useful items such as HDB. The only reason you should be sacking a Pokemon with good special attack and coverage in the first two turns is if you have to stop a set-up, or you're psychic and you know that they don't have any other Pokemon in the back that wouldn't like to be hit by a 125 Base Sp. Attack Fire Blast/T-Bolt/Focus Blast or Earthquake.
Focus Sash is still a really good item, but it needs some exceptions in the rule to account for Pokemon that are actually bulky (by perhaps lowering the threshold) or by having Focus Sash specifically not be put on Pokemon weak to Stealth Rock in a metagame where hazards are much more common than hazard control. Focus Sash is also a bit of a "noob trap" item that takes advantage of your opponent not knowing about your coverage moves for it to work effectively. You will notice the higher up in ladder you go, the less useful focus sash is.
Additionally, Focus Sash in Randbats is weaker than it is in other metagames because you have to scout the opponents team and Pokemon are bulkier and don't hit as hard due to even EV spreads.