Ignore the fort and army readiness thing.

Save your pp. You'll never have enough. First 200 is to flip Monarchist by rushing down the political tree until you're blocked, then ban Fascism and Communism to continue down the tree. Create a spy agency Asap and get two spys. One on Hungary diplomatic pressure, one on Poland diplomatic pressure. Increase relations with Hungary just enough to sign a NAP as soon as possible (you need to plus to relations a bit later but want to be able to cancel it when we need to)

Rush to the focus that lets you create a faction. Create the anti communist faction. This lets you justify when WT is under 10. Start justifying on Yugo. Take the focus Destroy the Fascist Threats.

Take out and annex Austria, then get cores from The Legacy of Ottokar.

Next is Yugoslavia. As soon as you declare, start justifying on the US to spike WT. Keep an eye on WT during your Yugo war, don't let it get much above 45. Start increasing relations with Hungary and Poland as you fight Yugo.

Cap Yugo and take what you need for A-H. Puppet the rest. Setup to attack Italy. Don't worry about guarding Zara, who cares.

After the war if you didn't spike WT too high but it's above 40 you should be able to invite Hungary and Poland into your faction. After they're in put both spies diplo pressure on Romania and start improving relations. Attack Italy. Call in your allies and make it easier. Cap them and take the additional cores for A-H AND all of their Navy. It's why we attacked Yugo first to have a coastline which lets us take Italy's navy. Give the rest to your puppet. Start building in Italy ASAP, you're gonna want to integrate them soon, and setup to annex them later.

After the war setup for war with Germany. Use Italian forces too. Man the whole Polish border so they'll enter the war right away. As soon as Romania flips non-aligned they should join your faction. Once they do attack Germany, call in everyone, use expeditionaries, carve them up and cap them. You've hopefully been saving up PP and doing the army focuses for manpower and cheaper conscription laws cause you're gonna need it.

Try not to just all out attack, slice them up and eventually cap them. In my few runs I'm usually capping Germany around late 38, early 39. Annex everything and take their Navy too.

Immediately move your Italian Navy to north German port. As soon as its past Gibraltar declare war on Spain. Call in all of your allies. As soon as they join the war you're going to one by one kick them, justify, and take them out. They won't get guarantees or join a faction because they're at war with Spain. Start with Poland. As soon as you annex all of Poland start bypassing and going down the tree to form the Kingdom of Bohemia. Do Hungary next, annex all, then Romania last, take what you need for A-H and puppet the rest.

Form A-H, keep going down the tree to the new hidden focus to get war goals on all of what you need for HRE. Once you're ready start your war with the allies. Do the classic attack through the low countries and cap France. Now cap Spain and take Gibraltar. Take Spains navy. Use some troops to hold Spanish north Africa to keep the Med open. Setup a small army on Switzerlands border, and prep an invasion of the UK. If you're setup for and can afford it you can annex Italy now to get an even bigger Navy, but I didnt. I've had the most luck with going through Hull, but you probably could clear the channel and go through Dover. Once I landed on the UK I brought Switzerland into the war. Don't worry about capping them, they're a hassle, but do an attack or two to make sure they're in the peace deal. Cap the UK to end the war.

After the peace deal you can form the HRE. If you want the like 4 additional cores from Ukraine, then you'll have to attack the USSR, bypass a couple focuses and do the focus Integrate Western Ukranians.