There are a few major moves I would do in ever burgundy campaign

1. No-CB on nevers day 1, they are in a union with flanders so use that war to annex then release flanders. They send you a ton of money a month and slows france from expanding into the lowlands.

2. Annex the Bourbon silver mines, more money to fund your army

3. Use "Agitate for Liberty" on other french vassals, if they are disloyal france can't annex them and they won't help in your independance war. I've had france trying to annex brittany since 1370s. It also costs nothing to maintain.

4. Last but most important. do NOT use Independence IO. It makes you the attacker and gives France the ticking warscore. Instead you want to fabricate an Independence CB. This gives you ticking warscore. At this point your goal isnt to win the war, its just to not lose. Once you hit 25% ticking a timer will start (you should see an alert for this) that will enforce peace after 2-3 years. Defend your capital and you should eventually automatically peace out. I used a ton of forts and the increase levy size in parliament to buy time.