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The chance of a hit from your weapon proc’ing a Jackpot (you will see the animation and hear the slot-machine sound) is < 2% and the number of procs is capped at 15 per run.
What you get for each Jackpot is some combination of the following (you can have multiple drops from one Jackpot) and depends on where you are playing:
The reason the Equipment Drop in World 7 and up says 1 in 53 (eqv) is because in these runs there’s a small chance of getting an uncommon or even rare item. The actual change of Equipment is 1 in 77, but adjusting for rarity (treating an uncommon as 3 and a rare as 9) gives an equivalent rate of 1 in 53.
Getting the best out of Jackbot:
- Regular drops (i.e. based on killing enemies) will still continue independently of Jackpots, and can be boosted if you can get Jackbot to 1 Star and learn the Equipment Drop Chance skill. As Jackbot shards to come by (he can appear in regular Summon gates once unlocked but I wouldn’t recommend buying keys for it) and he can rarely proc himself, the most reliable way to do this is to use gym passes (if you have them from the battle passes).
- Where to play:
- Playing your highest campaign world gives you the best loot and most chances of getting to 15 proc’s (because harder worlds need more hits to clear), but if your Jackbot is too weak to survive long enough to get 15 proc’s, then drop down a world or two.
- You can also play in the lower castle floors, tower tournament floors, and the easier daily event runs, but don’t expect too much - you will likely be clearing the runs too fast to get 15 procs and the loot is poorer.
- You could increase procs by playing with a weaker gun and/or without gear, but I don’t recommend it - it’s cumbersome, increases the play time, and could put you at risk of failing to complete a castle, daily event or tournament floors
- Choice of weapon:
- Because a larger number of weaker hits gives you more chances of proc’ing jackpot’s than a smaller number of strong hits, the best gun is the Looper and the best F2P gun is the Auto Handgun. Note that although the Looper is slower than the Auto, Piercing and Boomerang increase your hit rate a lot.
- The Plasma, Devastator, Gemini and Lasso are best avoided - not only are their shots more powerful, their special ability’s damage doesn’t proc Jackpots
- If you are not consistently getting 15 jackpots per run, you can try to optimise your perks / gameplay:
- Best are the perks that increase hit count and reduce damage/hit:
- All Shrapnel perks
- All the Indirect Hit perks
- Double/Triple Barrel
- Multishot
- Next the ones that increase your shots/second or their chance of hitting
- Spread / Vertical / Back shots
- Speed perks - Big/Small Attack Speed up and Sustained Fire
- Homing Shots
- Try to avoid the following (unless you need them to survive) because they increase your shot damage and reduce hits needed
- Big/Small Attack Up, Power Tripper, GunHeart
- Big/Small Critical Up
- Buckshot
- Fast Shots
- Focus Shots
- Berserk
- Revenge
- Try to avoid the following because their damage doesn’t proc Jackpots:
- Elemental perks: Fire / Poison / Flamethrower, Ice shots, and Zap Shots
- Death Perks
- Try to avoid instant kills:
- Don’t take Headshot and Titan Mode
- Don’t use Stars (e.g. World 8 and 9) / Kill Switches (World 8 and 10) / Crates (e.g. World 7)
- Best are the perks that increase hit count and reduce damage/hit:
Optimal level for Jackbot
It’s useful to upgrade Jackpot because then you can play him in higher campaign floors - this will not only give you better chances of Jackpot loot, but also increase regular loot (higher worlds have better drops), XP and coins.
His level 20 and 50 bonuses (+5% Dodge in each) are handy as well
However, you should prioritise your hero medals to ensuring that your main heroes (I recommend developing 1 each of Poison, Ice, Fire and Magic heroes) are at your player level before investing in promoting Jackbot.
Revision History
Feb 7, 2023: Revised to include Shrapnel as desirable perk - shrapnel can proc Jackpots