Phantom question

as i know rapid fire is 1 min 500 hit, doesnt Mille Augilles also 1 minute 500 hit x 2?

Mille is 333 hits per minute x 2 (180ms delay). It can only activate Noir Carte/Carte Noire 333 times a minute. Rapid Fire hits 500 hits per minute (120ms delay, RF is 1.5x faster, like Joe said) and can activate Carte Noire 500 times a minute. If you had max critical, and you hit max damage with Mille, Carte Noire, and Rapid Fire, you would do 999 x Max with Mille and 1000 x Max with Rapid Fire.

Strictly for training, I would do:

2nd Job: Power Guard, Rage/Mental Clarity
3rd Job: HS, Combo
4th Job: SE, Adv Bless

As for bossing, I would have:

2nd Job: Power Guard, Rage/Mental Clarity, Heal, Threaten
3rd Job: HS, Combo, Dispell
4th Job: SE, Rapid Fire or Hurricane (Depending on whether or not you have the pirate revamp, Hurricane will be stronger than Rapid Fire)

Mental Clarity because it stack with other buffs, after the next Warrior revamp, which gMS recieved with champions, Rage will also stack and you can use that rather than Mental Clarity. Power Guard doesn't consume mesos and it reduces knockback a bit. After 4th job, for party training, I generally used Rage, Combo, and Advance Bless or Lucky Dice, depending on how the party was, there was always a bishop or a second phantom with HS, so I used Lucky Dice for the extra EXP whenever I rolled a 6. If you're solo, I would recommend Rage, Combo, and HS. As soon as you have one point into the 4th job Talent of Phantom Thief/Impeccable Memory, you can cast a lower job buff and move it into the 4th job slot to maintain the max level of the buff if you wish to take advantage of that, otherwise I would use Rage in 2nd, HS in 3rd, and Combo in 4th until you've maxed Talent of Phantom Thief IV.

For attacking, I generally used whatever mob skill Phantom already had.

For bossing, Heal and Dispell are really just for pot cooldown maps. You can replace either Dispell or HS with Magic Crash, Dispell is replaced until you get to 200 or you have a bishop with you. I generally don't use crash except to avoid damage reflect, I just use soul steal for weapon cancel.