The are too probably many variables to provide any sort of sure thing solutions, but there are better approaches to take. I attacked in 1937 and got this in the middle of 1938 so I think my approach is fairly solid.
My advice;
-Tool your economy around a core (8+ divisions) of light tanks and lots of infantry, expanding as available.
- Don't be afraid to deploy under-trained/equipped infantry and exercise them up to Regular. Having more divisions deployed opens up more national focuses and allows you to send more volunteers to Abyssinia and the Spanish Civil War. 2-3 tank divisions should mop up those conflicts and easily become full veterans if you are methodical and don't rush straight for victory points.
- Devoting a single factory at the start to churn out traktor heavy tanks'll into stores will allow you convert a tank division later on when you go up against France. It'll come in handy when you start encircling French tank groups.
- Focus on ramping up war production with military factories. Don't bother with defenses or infrastructure. Getting the Civilian Factory national focuses early on will help.
- Don't waste time or national focus subduing the Czechs when you can befriend them and remove them as a threat.
- Try to get Hungry into the Axis prior to hitting Poland; I don't know what triggers the Hungry/Romania land dispute, but that will give you enough diplomatic juice to pull them in. They provided me with 10 extra divisions on top of my 60-80 as an expeditionary force which isn't to be scoffed at. You should also get volunteers from Venezuela and Italy.
- Don't waste national focus time declaring war on Poland, just justify it normally. The UK declared war on me, but France didn't. France starts off with pretty terrible political power, but I think this might also come down to how their focus tree is structured. It took them quite a long time to join the allies.
- Before attacking Poland, set up a Communist coup in France. It'll take 400 days so do it well in advance and work your timing around it. Once Poland is dead you can swing back and take advantage of the mostly unmanned Maginot line and storm right in while the defenders are busy fighting the Commies. If any of the forts are still manned just ignore them. Encircle them to cut off supply, leave some forces to make sure you aren't cut off but go for Paris and the victory points. Chances are your volunteer forces will serve to keep the remaining couple of forts busy. Very troll, but it works.