Playable with game version 1.02

Just unzip and drop into game directory, where the armoredcore6.exe is.

After beating the game, getting all the parts, beat all the enemies in the records arena and analysis arena. I made a list of all the parts and cross checked it with all the parts used the preset in AC data. Found out which parts are either completely unused or only used by 1 or 2 weak enemies. Used Witchy to mess around with some of the values of said parts and here we are. Unfortunately I can no longer unpack "AtkParam_Pc.param" with Witchy (and I don't know why) so the weapons damage, impact and accumulated impact are not changed, if I can mess with this file again I will. If parts are used by other ACs in story, I try to limit my changes so that it doesn't make the game too hard.

Modded parts, modded value and enemy ACs usage

Weapons
1. basic BUTT pulse sword - near instant cooldown, used by a lot of weaker enemies in story.
2. BML-G2/P05MLT-10 - faster missile speed, better guidance, increase total rounds, reduced reload time, ammo cost and weight. Not used by any enemy AC.
3. VP-66LS - increase bullet speed, ideal range, effective range, total rounds and doubled cooling, reduce ammo cost. (v2) increased firing rate and lowered normal attack heat buildup. Not used by any enemy AC.
4. napalm bomb launcher (v2), increased bullet speed, magazine size, total ammo, reduced reload time and ammo cost. Dual wield if you enjoy raining fire and melting bosses. Ineffective when fighting small, fast moving aerial target. Dolmayan has it on his back but I don't recall seeing him using it.
5. WLT 011 rifle (v2), lowered weight and ammo cost, increased total ammo, can easily dual wield and remain light weight. Used by the second last analysis arena AC
6. KRSV (v2), lowered weight increased total ammo and lower ammo cost, can easily dual wield and remain light weight. Used by 2 analysis arena ACs.
7. Chang-chen machine gun (v2). faster reload, larger magazine, more total ammo, lower ammo cost, doubled ideal and effective range. Used by 1 analysis arena AC.

Body parts
8. Finders eye head - except from energy load and system recovery, enhanced every other stat. Not used by any enemy AC.
9. ALBA arms - except from AP, energy load, defense and weight, enhanced every other stat. Used by one AC in the analysis arena.

Interior
10. the 12345 booster - every stat that has the word "thrust" in it, you can bet I increased it, also reduced QB reload time. Used by Mr. mad "easy" stomp and one early analysis arena AC.
11. FCS WLT-001 - extreme increase to every stat, used by the second last AC in analysis arena.
12. VE-20B generator - oh what haven't I increased to some ungodly level? Only problem this piece doesn't fix is world hunger. Not used by any enemy AC.

If you put the above parts together, you can have fun backstabbing 90% of all the ACs you meet as the machine flash.



Here is a list of all other unused or rarely used parts for anyone interested. They are also POSSIBLE future WIP.

the jailbreak series of body parts are all unused.
the HAL series is only used by the second last AC in analysis arena, but it looks like this AC is the same as one of the bosses in story so tread lightly.

Head
ALBA, shade eye, mind beta are only used once in analysis arena.

Core
Orbiter, once in analysis arena.

Legs 
Crawler, once in analysis arena.

Booster
NGI 001 and BST-G1/P10, both once in analysis arena, but NGI 001 was used by boss lookalike.

Close range
Baton, laser dagger, Ashmead and Moonlight, once in analysis arena.
Redshift and WLT - 101, once in analysis arena, but possibly same weapon as story boss.

Hands, ballistic
Duckett, completely unused.
Scudder, Chang-Chen, Viento, once in analysis arena.
Hu-Ben gatling, used by Michigan, but I really like the gatling.

Hands, explosive
Dizzy grenade launcher and Kyoriku fog launcher, completely unused.

Back
EULE shield launcher, BML-G1/P31DUO-02 and BML-G2/P08DUO-03, completely unused.
Huxley and VP60LT drones, once in analysis arena.
Trueno needle missiles, once in analysis arena.