How to reach 442 accuracy as a warrior

This was originally written by Alyosha on Discord.
Reformatted and uploaded by yours truly with permission from Alyosha.

Why do you want 442 accuracy?
As a warrior, you normally don't need this much accuracy.
The only reason why you would want this much accuracy is if you're trying to kill The Boss.
442 accuracy is required to hit The Boss 100% of the time.
You can calculate accuracy required yourself with the Accuracy Calculator.

What gives accuracy?
1 DEX gives 0.8 accuracy for Warriors
1 LUK gives 0.5 accuracy for Warriors
source: Ayumilove
Plus some skills, potions, and equips may provide accuracy.

Breakdown
Maple Pop: 100 accuracy
Sky Ski with accuracy scrolls: 44 accuracy
Monster Book Ring <Tier 10>: 13 accuracy
Helm with accuracy scrolls: 63 accuracy
Overall with DEX scrolls: 34 accuracy
Gloves with accuracy scrolls: 26 accuracy
Mastery skill: 20 accuracy
Sad Mask with DEX scrolls: 16 accuracy
Horntail Necklace after scrolled: 29 accuracy
Earrings with DEX scrolls: 9 accuracy
Shoes with accuracy scrolls: 12 accuracy
Total = 397 accuracy
Add some base DEX and consider other rings to get to 442 accuracy.

Additional/situational accuracy
GM buff gives 100 accuracy (Thank you Kirisame for reminding me about GM buffs)

Beholder gives some accuracy if you're Dark Knight (Thank you akashsky and MrPresident for Beholder information)
- Level 20 Beholder = 20 accuracy
- Level 25 Beholder = 25 accuracy

Bless gives 20 accuracy at max level, if you have a cleric in your party.

Details
The first thing you will need to do is farm tons of Maple Pops from Nightmare, Glutton Ghoul, and Glutton Ghoul.
Maple Pops give you 100 accuracy for 1 minute.
Remaining accuracy: 342

You can also scroll a weapon for accuracy, preferably one that starts with some accuracy like a Sky Ski.
Let's assume you have Sky Ski with 11 accuracy.
Using spear accuracy scrolls, you pass 2 30% and 4 70%.
This will bring the Ski's stats to 33 accuracy/14 DEX.
Overall that's 44 accuracy.
Remaining accuracy: 298

Monster Book Ring <Tier 10> is pretty solid for accuracy.
10 DEX and 10 LUK gives a total of 13 accuracy.
Remaining accuracy: 285

Scrolling accuracy for helm will provide a chunk of accuracy.
Alyosha's Zakum Helmet has 27 DEX, 15 LUK, and 34 accuracy, which is scrolled with 8 helm for accuracy 70%.
Tip: Helm for accuracy 70% give 2.8 accuracy rather than the helm for dex's 1.6.
Let's assume you have similar helmet, you will get 63 accuracy from Zakum Helmet.
Remaining accuracy: 222

You can get an overall and scroll it for dex, preferably one that already has DEX and accuracy like a Green Battle Road.
Let's assume you have a clean Green Battle Road with 5 DEX and 2 accuracy.
Pass 2 30%s and 6 70%s on that and you have 27 DEX 13 accuracy overall.
That gives total of 34 accuracy.
Remaining accuracy: 188

Gloves can give quite a bit of accuracy as well.
If you're nuts you can go for a Flamekeeper Cordon, they start with 20 accuracy on average (18-22).
More generally, you would scroll a Brown Work Gloves for accuracy.
Pass 2 30%s and 4 70%s and you have a 10 DEX 18 accuracy glove.
You will get a total of 26 accuracy from those.
Remaining accuracy: 162

Mastery skill gives 20 accuracy.
Remaining accuracy: 142

Get a Sad Mask and scroll it for DEX.
7 DEX and 11 accuracy will give you 16 accuracy.
Remaining accuracy: 126

23 DEX/23 LUK Horntail Necklace gives about 29 accuracy.
Remaining accuracy: 97

Let's assume you can get a 12 DEX earrings.
The earrings would give 9 accuracy.
Remaining accuracy: 88

You can scroll shoes for accuracy.
3 dex and 10 accuracy is doable for 12 accuracy.
Remaining accuracy: 76

You can scroll a 16 accuracy Raccoon Mask/White Raccoon Mask.
Remaining accuracy: 60

Scroll a Crimsonheart Cloak for DEX
Let's assume you get 16 DEX/4 LUK, which gives a total of 15 accuracy.
Remaining accuracy: 45

Have some base DEX and some random rings (56 DEX needed).
Remaining accuracy: 0

You now have 442 accuracy! SeemsGood

Disclaimer
The items used in detail are assumed to be moderately doable to get.
The whole guide is based on Alyosha's predictions and knowledge.
You can still kill The Boss with lower accuracy. You will just miss every now and then, depending on your accuracy.
If there is an incorrect/unrealistic information, please let me know