When to spend
Spend before risky dungeon or boss attempts so death does not threaten a large unspent pool.
How it differs from Tarstones
Gloom is not the same as Tarstone upgrades. Tarstones need their own data table.
Map tie-in
Beacon markers should become natural Gloom spending reminders.
Upgrade planning
Use the calculator as a spending guide before entering risky dungeons or boss attempts.