General

I personally think you should put 5 points in DF and then prioritize** in the following order:

1. Damage
2. Min Crit and Max Crit (Extremely good for Demon Slayer since DI always crits)
3. %Boss (This can be lower or higher depending on your current boss %)
3. Ignore Defense (This can be lower or higher depending on your current Ignore Defense)
5. Strength

Currently I'm level 212 and I have the following distribution: 7 STR, 5 MAX DF, 6 MIN CRIT, 6 MAX CRIT, 6 IGNORE DEFENSE, 10 DAMAGE, and 8 BOSS DAMAGE.

In the future, I am looking to put my points into max crit and min crit and if I were to reset it, I would probably put two less points in str and put those in max crit/min crit.

**The more points you put into a skill, the more points it costs. Therefore, the higher a skill is, the less it is worth on the margin! I would not recommend using all your points to max any single skill (except %Damage) unless your character is highly lacking in that area. Here are two extremely helpful charts that can help you determine what is best for you on the margin:

Damage Range Calculator:

docs.google.com/spreadsheets/d/192kJ1EQoRRSfSklr7cSnC_oBZHBzlyl_juE94uVqdjY/edit#gid=1040882420&vpid=A1

Hyper Stat Point Calculator:

docs.google.com/spreadsheets/d/1WFUndIdZanXoJ-ORklSXl3vbrhDa3z86NBZGPe0qkmI/edit#gid=1954759325&vpid=A1

Edit: Credit to ZeroByDivide for showing me the links and DelusionDash for actually making the charts.

I went for damage, str, min crit

Personally I went for status resist so I can get to 100% resist easily

I am at level 220, with 258 boss damage and 89 i.def.

I put in points:
1. Max DF (Its not essential to put in here, but that 50 fury sure comes a long way when training or bossing.)
2. Damage (straight up 400k range boost)
3. Minimum critical (I don't have a good glove so, I can't boost minimum critical effectively)
4. Strength (Gave some range boost)
5. 58 points leftover (probably going to go for maximum critical here)

DI/IC both are 100% crit rate so, that along with stance is useless for us. They were the reasoning for why I put where I did.

lol.
True order:
1. DF
2. Dmg
3. Boss
4-6. min crit, max crit, ignore defense any order. Just put 5 in each 1st and decide later which one to max first.
7. Str just put 5 and max last.

This is the lvl 250 build http://puu.sh/lHxxu/2aca809883.png
Hope that helped or whatever. You don't have to follow it exactly to the point.

Updated picture. Found out Max crit is 15% at max.

I would go in this order.

min/max crit, i dont think ds needs crit rate cuz DI has 100% crit
dmg% , boss dmg, pdr - depending on what you need more
STR (doesnt multiply with your str%)
Max DF
HP