I have strategy for doors. buy lockpicks or vitamins or all of that then use vitamins to seek chase phase 1 or use it when you have 2 level of the seek chase then beat library without using closets (i can do that but it slows the whole game if i record) buy crucifix and some else things if you have enough coins. Then use crucifix at 3 level of seek chase phase 2 and then use vitamins.

There are as i think 6 levels of seek chase phase 2 and in seek chase phase 1 4 or 5 levels

Then just greenhouse just using lighter or the best light source which is flash light

(Use lockpicks if you have locked chest because it can have crucifix, lighter, flashlight?, skeleton key, vitamins, lockpicks)

I got skeleton keys at the table somehow it's the 4 time when i got it