Chapter 3, Main - Guns
Chapter 4, Main - Blade, Blood Medal.
Chapter 5 Main - Family Book Experience Book
Chapter 6, Main - Austrian bracelets, crow badges, famous sheet music.
Chapter 7, Main - An excerpt from the classic speech
Chapter 8, Main - The Golden Lug.
Chapter 9 Main - Treasure Map Modified Guns
Chapter 10: Side - Plume Knife
Chapter 11: Side - The Eastern Blades
Chapter 12, Main - Improved Guns, Eastern Blades.
Chapter 13, Main - The Old Ribbon
Chapter 14 Main - Map of the Continent
Chapter 15, Main - Bloodstained Medals.
Chapter 16 None
Chapter 17, Main - 3 types of promotion medals
Chapter 18, Main - An Anonymous Love Letter
Chapter 19 - "The Engagement Ring," "The Tools of Repair," "The Unknown Love Letter," and "The Famous Sheet Music.
Chapter 19 Main - Cavalry Promotion Medal Noble Seal, Portrait of the Queen.
Chapter 20, Main - Tiger Stripes with Guns, Family Recipes, Military Books.
Chapter 21 None
Chapter 22 Main - Mapping Maps
Chapter 23, Main - Beheading Blade, Sapphire Fragments
Chapter 24 Main - Dragon Tattoo Sword
Chapter 25, Main - Dragon Tattoo Guns
Chapter 26, Main - Quality Guns, Secret Letter.
Chapter 27, Main - The Seal of Nobility
Chapter 28 Main - Lilies Coin


Be aware this translation is not fully accurate, it's just from the chinese guide you mentioned.. but should be fine approximately)

Offence mission 1 star(repeatable) - green guns
Defence mission 1 star(repeatable) - green blade

Repeatable 2 star are exp books, so pretty meh.

Basically what the aces can drop in summary:
1 unique accessory(maybe 2, don't remember?), some expensive loot, some permanent stat food, some medals and quite a few weapons for her.

Green gun/sword is great thing to farm in repeatable missions, those are huge improvement over starter gear and can be done easily.

My personal set in the early game was:
2x green guns, 2x green blades(the offence/defence 1 star repeatables)
+ some morale increase accessory(I used another DLC one that randomly appears in the offense mission - puppet cat +1 armor, +6 morale increase)

Mid game: I subbed in 1 improved blue gun(has 2 range but low durability - only 5)

Late game:
My final setup was:
1x green gun(8 attack, 14 durability, 85 hit rate, 0 morale, 1 range)
1x dragon gun(12 attack, 6 durability, 85 hit rate, 15 morale, 2 range) + 2 armor as extra stat
1x dragon blade(11 attack, 4 durability, 95 hit rate, 15 morale, 1 range) + 2 armor as extra stat
1x beheading blade(blue sword) (8 attack, 4 durability 90 hit rate, 0 morale, 1 range) + 4 atk/15 hit rate vs light and heavy cavalry
The final accessory is up to you, I kept using morale increase, but with legendary weapons giving so much morale - it's not a must at this point.

Green gun is amazing for it's huge durability at decent atk... Other weapons are actual 'power tools' for when you need the attack a lot.

The attack from her weapons does indeed matter quite a bit, since that's her only downside(having low atk)
I actually fed her all my atk buffs and she became an absolute monster.


Oh and also: pirate DLC mission ones do drop something, I only remember the last mission top pirate boss giving +1 attack permanent food

The free DLC(extra challenging missions) have nothing to steal, so no need to worry about stealing there.