The ceiling and the success rate is as follows:

The sum of the attack and attack grinding is maximum upgrade to +87
100 points once and increased by 1 attack

The sum of the defense and defense grinding is maximum upgrade to +87
100 points once and increased by 1 defense

Attack rate is maximum upgrade to +50%
150 points once and increased by 1 attack rate

Defense rate is maximum upgrade to +50%
150 points once and increased by 1 defense rate

Hp is maximum upgrade to +2000
300 points once and increased by 100 HP

Hp+MP+SP recovery rate is maximum upgrade to +20%
300 points once and increased by 1% recovery rate

Hit rate is maximum upgrade to +50%
150 points once and increased by 1% hit rate

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The color list: