Indispensable Charms:
Drunkard Charm
Heavy Drinker Charm
Clearheaded Charm

Drunkard build is the least risky build among the bad state enhancement builds.
now let's see if you equipped 2 drunkard, 1 Heavy Drinker , 1 Clearheaded , 1 Ardent
your basic attack is 100
your attack will become (100+100)x(1+0.6+0.6)=440
it's mean samurai's heavy attack's can give enemies 440 damage.
sumo wrestler's Double Thrust's damage is 660
ninja's jump heavy attack's damage is 880
you can defeat normal zombies easily with normal attack only in normal difficult
also your secret arts become more powerful.
for example samurai's DO-GE-ZA's damage will become 440x2.5=1100
sumo wrestler's Hyper Shiko will become 440*5=2200

let's see when attack is 210, equipped 3 Glutton, 3 Drunkard, 1 Heavy Drinker, 1 Clearheaded, 2 Tainted, and enemy is poisoned.
attack will become (210+300)x(1+1.8)x1.6x1.6=3655.68
samurai's Pommel Hit's attack will become 18278.4
sumo wrestler's O-JI-GI will become 21934.08
ninja's jump heavy attack will become 7311.36
This is enough power to easily defeat boss in normal difficult

be careful, this build is not work on Ninjutsu Attributes and Throwing Attribute.
some ninja's secret arts cannot be improved with this build

Indispensable Charms:
Taster Charm
Poisoned Charm

Recommended Charms:
Butcher Charm x 2

The condition for activating "Taster Charm" is poisoning, so base attack power is halved.
when you equip 1 Taster, your Attack Multiplier will become 50%+100%=150%
if you equip 2 Taster, it will become 250%.
If you want to equip this build on the road, It is better to equip 2 Butcher Charm
because Poison makes hunger decrease faster
you can use throw bad meat on the fire to grill the meat, or throw Flaming Knife or bomb etc. to grill the meat.

let's see if your attack is 210, equip 3 Taster, 3 Glutton, 1 Poisoned, 3 Tainted,
and Boss is poisoned
your attack will become (210+300)x(0.5+3)x1.6x1.6x1.6=7311.36
samurai's Pommel Hit's attack will become 36556.8
sumo wrestler's O-JI-GI will become 43868.16
ninja's jump heavy attack will be 14622.72

this build is not work on Ninjutsu Attributes and Throwing Attribute.

Indispensable Charms:
Hot-Blooded Charm
Flaming Charm

Recommended Charms:
Fire Resistance Charm x 2 or more
Thermal Energy Charm
Glutton Charm
Heal Charm

Damage from burning is 5% of max HP
If you don't recover, you'll definitely die.
Fire Resistance Charm can reduce flame damage by half
if you equip 2 Fire Resistance Charm, fire damage will be 1.25% of MAX HP
sumo wrestler's secret art Spread Eagle can recover easily
if you equip Thermal Energy Charm,
You don't have to worry about being hungry.
This build is very compatible with sumo wrestlers.
other character also can use Fire Build on boss battle
Burn damage can be nullified by eating Invincible Herbs

let's see attack 210, 3 Glutton, 3 Hot-Blooded, 3 Fire Resistance, 1 Thermal Energy,
your attack will be (210+300)x(1+3)=2040
sumo wrestler's Double-handed Thrust's attack will be 3060
you can delete all Fire Resistance and equip Fueled or Tainted on boss battle
if you equip 3 Tainted, your attack will be 8355.84
O-JI-GI's attack will be 50134.04

this build is not work on Ninjutsu Attributes and Throwing Attribute.

Indispensable Charms:
Frenzy Charm

This is a very powerful build, but I don't recommend using it on the road.
The real effect of this charm is attack power +400% maximum.
if you equip 2 Frenzy Charms and your HP is 1
your attack will be +800%
If you don't eat a single Vitality Pill along the way,
you can equip several Frail Charm to let HP become 1
of cause you can eat all Vitality Pill, and equip Heavenly Charm.
Heavenly Charm's damage is 2% of MAX HP
it can let your HP become 2~4% of MAX HP
When HP is below 100, attack is roughly +350%

let's see attack is 210, equip 3 Glutton 3 Frenzy(attack is roughly +350%)
your attack will be (210+300)x(1+10.5)=5865
samurai's Pommel Hit's attack will be 29325
if you equip 4 Tainted
your attack will be 5865x1.6x1.6x1.6x1.6=38436.864
it's mean you can use normal attack to kill every boss very easily

Indispensable Charms:
Catapult Charm

Yes, just the Catapult Charm
But first you need to know top 3 throwing items in this game
1. Sacred Tree Nut. damage 1500
2. Salted Rice Ball. damage 1300
3. Bamboo Spear. damage 800

Suppose you have four Sacred Tree Nut
and you throw it all at the enemy's head
your damage will be 1500x3x4=18000
if you equip 3 Catapult Charms,
your Sacred Tree Nut head shot total damage will be 1500x3x4x(1+2.4)=61200
Sacred Tree Nut is a pretty powerful weapon.
but don't forget Dojo and Sacred Tree blessing makes thrown items stronger
If a lot of Catapult Charm appear on the way, it's not a bad idea to keep them as trump cards.

Also applies Ninja's throwing attribute secret arts

Indispensable Charms:
Weakness Charm

This is not an item you equip, but an item you throw at the boss.
Weakness Charm can make damage become 2times
if you throw 4 Weakness Charm, the damage will be 16times

let's see when you throw 2 Weakness Charm and Flaming Charm or other fire item to boss
the fire damage will become 20% of MAX HP
If the boss has fire resistance
you can throw Heavenly Charm to boss

Add a supplementary explanation
fire damage is 5% of MAX HP
The effect on bosses is not permanent.
Heavenly is 2% of MAX HP
Permanent effect except for flying bosses

If you see a "weakness charm", secure it first.

Indispensable Charms:
Calm Charm x 2
Heal Charm x 2

Recommended Charms:
Glutton Charm
Taster Charm and Poisoned Charm
Beast Charm

Empty stomach damage is fixed at 30
When you equip two Calm Charms, the damage will be 15.
If you equip two Heal Charms, you can greatly suppress the "empty stomach" damage.
Combined with the recovery effect of Secret Arts,
players don't have to worry about hunger.
You can also equip the Beast Charm to greatly increase your attack power.
Taster does not increase the power of ninjutsu,
but Beast does, so this build is also suitable for ninjas.