If nuclear war is inevitable, this scenario is more effective.
China is completely desperate, has no hope for the future and is ready to accept destruction. He built 40,000 nuclear warheads.
10,000 warheads attack the US
10 000 warheads to attack Europe
10,000 warheads were used to hit Africa, South America, and Australia.
The remaining 10,000 warheads are used to detonate in the air and under the ocean. The aim is to completely destroy the global ecosystem.
Taiwan independence, then the world will end.
Like I said the most effective post-modern means to deliver nukes are:
(1) submarine torpedoes warheads to breach on the shore and detonate on coasts (easy to defend against with torpedo/sub nets, can counter measure with cutters or divers, etc)
(2) hypersonic glide vehicles (can be taken down with EW if not protected enough)
(3) have 1000 air fields with 1M drones who are well-defended from EW with 200000 nuke bombs, launch the 1M very long range high endurance high alt drone in 15 minutes from 1000 airfields, swarm the enemy.
(4) Millions of low tech rockets, high tech ECM, V-2 type intercontinental rockets. With accuracy of 100-1000km swarm the enemy. Both swarming techniques require heat shielding from lasers so laser defenses would take more time and be more difficult. (You would have to do a study on how far HAARP effects missile trajectory to figure out how wide an area to target and if this would work against HAARP defenses - see video below)
We are living in the age of swarms. When Iran was allowed to use BMs against us bases, that was allowed because Washington does not want to reveal ABM systems to Iran or China. And supply cheapo-export unless ADS to Saudis.
Remember you are dealing with usa that cause 10km earthquakes every week in places like Iran. I was on some creepy cia infested forum, I forgot which one, on the day when Iran had the BM attack, and there was an earthquake. The cia-esque trolls were high fiving each other than another 10km usa triggered earthquake hit the Iranian underground nuclear development base. And that there were reports of considerable damage from the "HAARP earthquake" caused by usa weather modification weapons.
Swarms with full defenses against EW attack is the most effective way to deliver nukes. And you don't need each to have a nuke. You simply need to overwhelm the defenses.
If there are no mass laser defenses, then you can have less in swarms as Isreal-Gaza War showed that running out of missiles is a real problem. Once there are laser defenses, you need to have very massive swarms, as lasers pick off your delivery methods every few seconds, so do the calculations.
Ever heard of Martin Sheen, here is Martin Sheen telling the Chinese that ICBMs don't work anymore: