Weekly Legendary Crafting Plan/Notes:
The numbers shown are based on having the game running pretty much non-stop with LGE Billy and LE Mindy to speed things up. 130/day was the original average, though I am now finding closer to 140-150/day. At the same time materials in chests were 5.5 before and now getting coser to 4.8, so I made no changes to the numbers.
Everyone's chests gained per day/week will be different, but the 4.8-5.5 number should be close, so you could take chest per week * 5.5 to get materials per week to determine what you have to work with and the plan to take.