With 6 World Energy per hour, filling the monster chest should not be a problem
But Season 1, Province 7, Stage 3 ( 1.7-3 ) has a huge number of monsters per World Energy for filling the monster chest
Most monsters in 1.7-3 are purple/ dark so also good for filling a purple/ dark rare chest
Skipping chests
You can spend gems to skip chests ( see notes )
Skipping Titan chests
You cannot skip titan chests
Skipping Monster chests
The only time I recommend skipping wait on Wanted Monster Mission Chest ( AKA monster chest ) is before Legendary training, before three rainbow 4* 3.60 teams, or if you REALLY need food or iron.
Skipping Raid chests
The only time I recommend skipping wait on Wanted Hero Mission Chest ( AKA raid chest ) is
You monthly budget can afford it,
You can open in Platinum, or Diamond,
You have maximum food storage, and maximum iron storage,
You need food and/ or iron and/ or 3*
ascension items ( farmable/ non farmable )
and you have all 15x allowed teams, at least 2x pins ( for pin codes ), and 15x to 45x empty hero roster slots for collecting training camps