recommended times to reincarnate?

[Koleda]

i do know how does it work, but do i keep on reincarnating when i master every few classes or just keep it up at leveling up? 2 of my units have reincarnated thrice while recently training 2 other units which reincarnated once

how many times do you normally reincarnate to reach 9999?

[Z3n]

If you master every class, you can reincarnate only once and then level up to 9999 while in the maxed Elite 4 squad to reach the cap of 10M base stats (HP has a higher cap, so you can use a Raised Flag subweapon and the HP growth evility while doing so to get more HP, not that it matters too much compared to what you get from a custom curry stuffed with carnage elixirs).

You can use Geo Blast (skill) or Trash Pickup (evility from Raspberyl) in the Item World of a high rank carnage item at 20 stars to deathblow geosymbols/etc. and master classes easily. Use Prinny Instructor (evility from Valvatorez) coupled with Prinny Hat (evility from Fuka) or the Prinny squad to increase your gains. Make Gency Exits at the alchemy shop.

I would suggest to raise Metallia to 10M base stats using this method, and then use her overload in Double Fake at the highest difficulty you can manage (20 stars if possible) to capture prisoners and create extracts for 10M base stats to everyone, starting with her (use a maid with Licensed Caregiver and Cannon for an Arm to apply extracts to 5 characters at once). You can raise Pram and use her unique evility to take care of the boss. Then master every class with everyone else, reincarnate, etc., to get everyone to 20M base stats. It's easier to master classes when you already have 10M base stats, you can just use MT4.

https://www.youtube.com/watch?v=aaJjnygQHbU

https://www.youtube.com/watch?v=ypN7OB19MgI

[CarThief]

Pretty much what they said. You can max out all the subclasses without needing to reincarnate. Just be sure to reincarnate after you maxed em all out.

Though for levelling to 9999 on Elite Four, i'd recommend that you THROW Geo Symbols instead (hit enemies/neutral entities with them so the symbols aren't caught and die), Geo Blast being a Deathblow seems to reduce XP gained, but throwing them grants more XP, so that's your best bet (and less grindy then giving everyone Geo Blast scrolls). For levelling subclasses, throwing Geo Symbols or Geo Blasting them works either way.

Don't forget to set your XP earning ratio to 1000%, difficulty to 20 stars, and go into a Carnage Item World such as Mushroom Soup or Elixirs from the Carnage dimension. Do that and you'll get level 9999 on Elite Four in no time as you throw symbols. (On that note, don't forget to upgrade your Elite Four group so it's growths are 100%!)

Oh, and if you got a unit at 20M stats (10M from training, 10M from extracts/shards), you can give them Evilities that raise their stats (up to a maximum of +100%), which can get them to 40M stats by doubling their stats, effectively (turning that 20M into a 40M).
That only boosts their natural stats though, stats gained from items don't get multiplied this way. (And if you want to go beyond 40M, you'll probably need to grind a item to 2M stats (ideally on 20star difficulty for best item growths), have that unit wear the 2M stat item x3 times, get that character's Armor Skill to 100, and get their Equipment Aptitudes to - or near - 300% to maximize the stats they can pull out of the item. That can get you roughly another 60M in stats, putting you at - or very close - to the 99M cap.)