I recommend MoreCheckmarks and KeysInLoot. For me, I used to hoard /every/ potential item i needed, and now I only look for what I need at the exact moment, which is what MoreCheckmarks helps with. For the others, they just make loot more interesting imo, and pity loot still helps make sure you find what you need.

{
  "enabled": true,
  "debug": true,
  "trace": false, // Logs a LOT of stuff, will cause your game to lag when accepting/turning in hideouts/quests

  "appliesToQuests": true, // Whether or not to account for quest items in pity odds
  "appliesToHideout": true, // Whether or not to account for hideout upgrades in pity odds
  "increasesStack": true, // Whether or not drop rate increases stack
  // e.g. if two quests need the same item and are at 20% and 80% pity
  // with increasesStack = true, the pity odds are 100%, so drop rate is doubled
  // with increasesStack = false, it take the maximum of the increases, in this case 80%, and uses that

  "includeScavRaids": true, // whether or not to count Scav Raids as "increasePerRaid"
  "onlyIncreaseOnFailedRaids": true, // Don't increase pity when you extract successfully

  "includeKeys": true, // Whether or not to include quest keys (like rusty bloody key, or west wing 216) in pity system
  "keysAdditionalMultiplier": 2.5, // Additional multiplier on top of normal ones.
  // If a quest needs items and stuff behind a locked door, and the items are at 80% pity
  // The quest key would be at 200% pity (a 3x increase)

  "maxDropRateMultiplier": 10, // Max multiplier for items. E.g. at default 0.2 increase per raid,
  // after 45 (10-1 / 0.2) raids your loot rate would be 10x normal for that item

  "dropRateIncreaseType": "raid", // `raid` to use raid increase below, `time` to use per hour increase
  "dropRateIncreasePerRaid": 0.2, // Additive multiplier increase per raid (0.2 = 20%), 1 raid = 20%, 2 = 40%, etc.
  "dropRateIncreasePerHour": 0.05, // Same as above but for hours. 1hr = 5% increase, 1 day = 120%

  "appliesToWishlist": false, // set to true to enable
  "wishlistMultipliers": {
    // delete entries in here if you dont want multipliers to apply
    "tasks": 5.0, // This will give all items on the "tasks" wishlist 5x the chance to spawn
    "equipment": 5.0,
    "barter": 5.0,
    "hideout": 5.0,
    "other": 5.0
  },

  "excludeCollector": false // Whether or not to exclude the collector quest for bonus items
}

For quests, tracks all the “Handover” quests you have (including custom traders), and will continue calculating pity until you have enough to turn the quest condition in. (this also accounts for find in raid items). For gunsmith quests, will automatically add drop chances for the items to Weapon Boxes + Wooden Crates if they are not already there.

For quest keys (if enabled) has a hardcoded list of keys you need for each quest. Keys have a higher pity multiplier by default, and for quests that can use multiple keys (e.g. lend lease part 1), will keep counting pity until you have /both/. If a key is missing from loot tables, will automatically add a spawn chance for it in jackets.

For hideouts, only starts tracking possible upgrades where you meet all the prerequisites, like needed other hideout area levels, trader loyalty levels, or skill progression levels. E.g. if you require Lavatory 3, Mechanic 3, and Endurance 5, it won’t start tracking pity levels until you meet all of those. Even though you can’t partially turn in items for hideout, will track each item separately. If you need 5 hoses and 5 nails, and you have 3 hoses and 10 nails, it will only give you pity odds for the hoses. If you sell/barter 7 nails, to only have 3, it’ll reinstate pity odds for them.

Example

Loot odds in SPT are roughly configured like so (Higher odds are more likely to show up in loot):

TechnicalCrate: Items: [Hose, Wires, Capacitors, Ledx], Odds: [1000, 5000, 3000, 10] Jacket: Items: [Dorm 220, Dorm 206, Marked room, West wing 216], Odds: [300, 200, 1, 50] Hoses will show up on average 1000/(1000+5000+3000+10) = 11% of the time, and West Wing 216 will show up 50/(300+200+1+50) = 9% of the time.

Now lets say you are on the default settings (seen below), and need Hoses for hideout, Hoses for quest A, and West Wing 216 for quest B. If you have /just/ started all of these, your pity odds are 0, so the odds are the same as above. If you have done 10 raids since you could build the hideout upgrade, 4 since you started quest A, and 10 since you started quest B, your new hose multipliers are (because increasesStack is on by default) 1+(10*.5 + 4*.5) = 8 and your new WW216 multipliers are (1+(10*.5))*2.5 = 15 (Because keys get an extra 2.5x bonus by default). This means hoses become 8x more likely to show up, WW216 becomes 15x more likely to show up, and Pity loot overwrites the loot tables to be:

TechnicalCrate: Items: [Hose, Wires, Capacitors, Ledx], Odds: [8000, 5000, 3000, 10] Jacket: Items: [Dorm 220, Dorm 206, Marked room, West wing 216], Odds: [300, 200, 1, 750] Hoses will show up on average 8000/(8000+5000+3000+10) = 50% of the time, and West Wing 216 will show up 750/(300+200+1+750) = 60% of the time.

Note: this is just an example, in practice there are hundreds/thousands of items in the loot table, and depending on how rare you original item is a 10x or even 100x increase still may not feel like a lot. You are always welcome to increase the dropRateIncreasePerRaid/Hour and maxDropRateMultiplier to something like 10 and 10000 respectively if you’re really stuck on a quest