Stat Conversions question

[Mirage]

attackers str vs targets vit affects total "DMG" rating of your weapon. Every 4 str you have over the targets VIT, you gain 1 DMG. The reverse is also true.
2 str increases attack by 1 for one-handed weapons
4 str increases attack by 3 for two-handed weapons

crit rate is dependent on target AGI versus attackers DEX. Unsure about the exact values. Might be 4 dex for +1 crit percentage, and the reverse for AGI avoiding crits

MND affects magic that cures HP, along with magic defence

2 vit increases defence by 1

2 AGI increases evasion by 1, along with parry, guard and shield skills. Unsure about the exact values of these. 2 AGI is also 1 ranged accuracy.

2 accuracy (or ranged accuracy) is equal to +1% hit rate, assuming you're not below the lower hit-rate cap, and at, or above the upper hit rate cap (95%).

2 Evasion is equal to -1% hit rate, also assuming you're not at evasion cap

Int affects spell damage (including ninjutsu), and also increases lockpicking success for thieves. I think it also affects spell accuracy.

Chr affects charm, dancer abilities, and bard abilities. Usually success rate, potency, duration, or a combination of these.

Haste is a percentage reduction in weapon delay/spell recast time. 10% haste will reduce a recast timer (and weapon delay) to 90% of its original value. Spell recast reduction caps at 50% haste (half as long recast timers) and attack delay caps at 80% (attacks occur 5 times faster). This is why haste "accelerates" the more you get. Going from 45% to 50% will increase the damage output of a melee by much more than going from 0 to 5%.

Haste is usually regarded as the single most important stat when DDing (excluding weaponskills), but does not affect ranged attacks.