Why even bother training your stats?
VITALITY - increases your maximum HP
POWER - increases the chance of executing a stunt without any loss to your HP
MUSICALITY - possibility of doubling stamina while dancing reggae and hip-hop (same as power - reggae and hiphop moves only)*
AGILITY - possibility of doubling stamina while dancing popping and locking (same as power - popping and locking moves only)*
These stats will greatly help you when you're in dance mode because you can do stunts (especially the high leveled ones) more.
* Not sure about these. Please correct me if I'm wrong.
Training Vita and Power
The Stop Dance
Have you ever wondered why some people stop dancing even when the song hasn't ended yet?
The reason why we end the dance after a successful series of stunts is so we can do another series of them. The aim is to do as many stunts as possible in a song. If you don't stop the dance, you have to dance all the way through to regain your HP (assuming that you've already used your satay). If you stop the dance, you can refill your HP bar by using walk in the clouds, start the dance again and use flower power next. In just 4 hits (assuming that all of those are perfect), you can start doing stunts again.
When to train
Anytime. But if you're really on the run, do it also on the double attributes event so you can save up time training.
Where to train
Unless you're a monster player, just stay at the 81-105 halls. Dancing at these halls will decrease your chances of missing during stunts.
Finishing your stunts successfully is important because there's an extra bonus on the vitality EXP.
Power = number of stunts
Vitality = successful stunt
How to train
Preferred setting during dance mode: Easy - 4keys - Song
Setback: You won't earn much score during training.
To summarize, training is like this:
1. Use walk in the clouds/blood of the t-rex (refills your HP when you're NOT dancing).
2. Start dance.
3. Use flower power/joy bomb/midnight powder (refills your excitation).
4. Start doing stunts when you reach the Lvl 5 keys.
5. When your HP is almost gone, use satay/dino egg (refills your HP when you're dancing).
6. Stop dance when you're done with your series of stunts.
7. Repeat steps 1-6.
Stunts to use
It's best to use stunts which subtract only 30HP on your life like the following:
1. Super 6 steps variation 2
2. Wave Gliding
3. Knee Spin
4. Twelve Steps (35 HP stunt - this actually depends on the total HP left after the 30HP series)
Cool down time
You don't need to wait for your HP to reach 0 to use the satay. It's actually best to use it before, so you can start the cool-down time of the item asap.
Ex:
Total HP = 255
Satay HP = 140
Use satay at this HP = 105 (after 5 stunts at 30 HP)
How do I train my stats with only minimal (or none at all) base level EXP gain?
Use only 4 keys and don't perfect your hits. Instead, aim for the good and bad ratings. That way, your base level EXP will be lower hence you can raise more power for each level. One way also is to do group dance while training. You won't gain EXP but your stats will increase.
Training Musicality and Agility
Where to dance
Dance halls are assigned as Musicality and/or Agility halls. Check out NhieNhie's where to dance guide to know which halls you want to go to when training these 2 stats.
Go to these halls and try to get high scores without using stunts.
Preferred setting during dance mode: Common - 8keys - Song
That's it! Be patient and be ready to devote lots of time for training. After some time, you'll notice the effects of the stats and you'll feel glad that you trained.
This is only based from my experience and is definitely not foolproof. Comments and suggestions are welcomed =)
[From a reliable source :D]