I wish to suggest that the following be considered for addition to OP chests load-out.
Moderately rare (about as rare as ender pearls, one in every 4-6 chests):
TNT
Blaze Mob Eggs
Fireworks
Common (small number in 50% of chests):
Obsidian
Diamond blocks
Ice
Cake
I do not see the blaze mobs causing much server lag. OP chests is rarely seen on Sky Wars - and rightly so - so it should not be a huge load.
Moderately rare (about as rare as ender pearls, one in every 4-6 chests):
TNT
Blaze Mob Eggs
Fireworks
Common (small number in 50% of chests):
Obsidian
Diamond blocks
Ice
Cake
I do not see the blaze mobs causing much server lag. OP chests is rarely seen on Sky Wars - and rightly so - so it should not be a huge load.