Question about skill tiers

Game Discussion
1

Long story short, the wiki says that savant’s weapon skill tiers are as follows:

Skill 1 — 20 (Tier 1), 54 (Tier 2), 100 (Tier 3)

Skill 2 — 50 (Tier 1), 84 (Tier 2), 130 (Tier 3)

Based on the factual information above, what does skill 1 means?

Does “skill 1” symbolizes the specific skill notes (no matter its unlock requirements) you placed/attached on the first skill slot?

Or does “skill 1” signifies the very skill notes that requires the lowest amount of stats invested to be unlocked (20 weapon stats)?

Just asking so that I can use my stat points wisely.

2

I mean, if I were to say, I believe the latter assumption is correct. But I just want assurance :disappointed_relieved::sob::scream:

3

i think it means like skill 1 is the very first skill of the weapon, no matter where you place it in another, whirlwind will still be skill 1 because it is the first skill you can use on the sword, no matter where you replace it in another weapon while skill 2 will be the second skill blah blah blah

4

just means a skill node with a base requirement of 30 (essentially 0). basically the first base skill of each weapon type without disarming
worth nothing placing a skill in the 3rd or 4th slot of a weapon also raises the tier requirement i believe