I used the same strat from the original run.

Have it hold a shell bell.

Mud shot x 3. It will probably knock you out when it resets your stats.

When you come back, swords dance x 2. Then tera and spam Seed Bomb.

You’ll come close to the end of the time but it worked for me.

Luckily I had an Annihilape build. Worked like a charm. Thanks!

But the strat doesn’t use any moves that lowers its defence or raises my attack 🤷‍♂️

I’ll try that Avalugg strat someone posted in this thread.

I’ve been using that Orthworm strat but weirdly I’m doing more damage when the shield is up. When the shield is down my moves aren’t really making a dent and running out of time and losing.

T1: Gastro Acid to remove Moxie
Acid Spray until Salamence is -6/build Tera. If close to being knocked out, set up an Attack Cheer before coming back in.

Tera Thunderbolt until Salamence stat reset.

Acid Spray once or Tera Thunderbolt (if low HP).

Use Tera Thunderbolt until end.

This solo strat worked for me.

Eelektross @ Shell Bell
Ability: Levitate
Tera Type: Electric
EVs: 4 HP / 252 SpA / 252 SpD
Modest Nature
- Gastro Acid
- Acid Spray
- Charge Beam
- Thunderbolt

Roll for Intimidators, Drifblim (WoW), or Bellibolt (Light Screen/T-Wave).

T1: Skill Swap (you should outspeed Skeledirge)
T2: Superpower (you should be knocked out at this point and avoid Skeledirge resetting your stats)
T3-8: Superpower until +6 (if needed use Heal
Cheers)
T9+: Tera Water Tera Blast (if needed use Heal Cheers), boosted by Metronome

This solo strat worked for me

Malamar @ Metronome
Ability: Contrary
EVs: 252 Attack 252 Speed 4 Special Defense
Nature: Jolly (to outspeed Skeledirge at +1 after Flame Charge so Skeledirge won't potentially OHKO'ing before you begin)
Tera: Water
Moves: Skill Swap, Superpower, Tera Blast, Rain Dance