Explain multiplies vocations

[Sigoles]

can someone explain this multipliers please?
I mean skill id 0 to 6 with diff multipliers

<vocation id="6" clientid="4" name="Elder Druid" description="an elder druid" gaincap="10" gainhp="5" gainmana="30" gainhpticks="4" gainhpamount="10" gainmanaticks="2" gainmanaamount="10" manamultiplier="1.1" attackspeed="2000" basespeed="220" soulmax="200" gainsoulticks="15" fromvoc="2">
        <formula meleeDamage="1.0" distDamage="1.0" defense="1.0" armor="1.0" />
        <skill id="0" multiplier="1.5" />
        <skill id="1" multiplier="1.8" />
        <skill id="2" multiplier="1.8" />
        <skill id="3" multiplier="1.8" />
        <skill id="4" multiplier="1.8" />
        <skill id="5" multiplier="1.5" />
        <skill id="6" multiplier="1.1" />
    </vocation>

 

[BahamutxD]

Skill advance rate for each class.

SKILL_FIST = 0
SKILL_CLUB = 1
SKILL_SWORD = 2
SKILL_AXE = 3
SKILL_DISTANCE = 4
SKILL_SHIELD = 5
SKILL_FISHING = 6

 

[Sigoles]

Skill advance rate for each class.

SKILL_FIST = 0
SKILL_CLUB = 1
SKILL_SWORD = 2
SKILL_AXE = 3
SKILL_DISTANCE = 4
SKILL_SHIELD = 5
SKILL_FISHING = 6

and ML?

 

[BahamutxD]

and ML?

manamultiplier or config.lua