Speaking of DSUxie, I have been using him in tandem with Linoone the past few days, and my success rate so far is unprecedented (not counting the glorious days of Wynaut cheapness). Yawn/Screens/Memento makes it really easy to get Linoone in on either a sleeping or 1/4 attack power opponent every time. Coupled with Trapinch (for Steels of course), Linoone is pretty unstoppable.
After some tweaking I think I found my favourite two secondary attacks: Seed Bomb and Return. It may seem like redundant coverage with ExtremeSpeed, and sounds easily walled, but consider the following:
There are only four ghosts that Shadow Claw can OHKO but Seed Bomb cannot - bulky Drifblim, Dusclops, Bold 252/252 Rotom, and Shedinja. Drifblim and Dusclops, while not unseen, are rare. Drifblim is often a lead and will probably have Substituted down to 25% of its health (easily KO range) by the time Linoone is on the scene. Bold Rotom is also a fairly rare sight, and will be even rarer once Staraptor is banned. Shedinja is the rarest of all, and though, while lacking Shadow Claw will leave you completely walled by Shedinja, even with Shadow Claw most will either kill you after Focus Sash activates, or with a Banded Sucker Punch. This is, of course, assuming there is no Stealth Rock on the field, which renders Shedinja useless.
Return, meanwhile, will ensure a few KOs that ExtremeSpeed cannot. Weezing, Torkoal, some Uxie, and Drapion are all OHKO'd by Return after Stealth Rock damage, while ExtremeSpeed (or Shadow Claw vs. Uxie) will fail to KO in each case by a small margin. Return also has a chance of 2HKOing a 252/4 neutral-natured Registeel, dealing a minimum of 47% damage. Also, after being Intimidated a couple times (which any good player with access to Intimidate will do), the extra power of Return is appreciated.
After some tweaking I think I found my favourite two secondary attacks: Seed Bomb and Return. It may seem like redundant coverage with ExtremeSpeed, and sounds easily walled, but consider the following:
There are only four ghosts that Shadow Claw can OHKO but Seed Bomb cannot - bulky Drifblim, Dusclops, Bold 252/252 Rotom, and Shedinja. Drifblim and Dusclops, while not unseen, are rare. Drifblim is often a lead and will probably have Substituted down to 25% of its health (easily KO range) by the time Linoone is on the scene. Bold Rotom is also a fairly rare sight, and will be even rarer once Staraptor is banned. Shedinja is the rarest of all, and though, while lacking Shadow Claw will leave you completely walled by Shedinja, even with Shadow Claw most will either kill you after Focus Sash activates, or with a Banded Sucker Punch. This is, of course, assuming there is no Stealth Rock on the field, which renders Shedinja useless.
Return, meanwhile, will ensure a few KOs that ExtremeSpeed cannot. Weezing, Torkoal, some Uxie, and Drapion are all OHKO'd by Return after Stealth Rock damage, while ExtremeSpeed (or Shadow Claw vs. Uxie) will fail to KO in each case by a small margin. Return also has a chance of 2HKOing a 252/4 neutral-natured Registeel, dealing a minimum of 47% damage. Also, after being Intimidated a couple times (which any good player with access to Intimidate will do), the extra power of Return is appreciated.