Here's some calculation for character gacha:
Let's assume that R 50%, SR 33%, SSR 17% (actual rate aren't revealed)
- UC 20 Total (Due to basic gacha, cost effectively 0)
- R 16 Total (16 / 0.5 = 32 * 13 = 416)
- SR 12 Total (12 / 0.33 = 36 * 13 = 468)
- SSR 6 Total (6 / 0.17 = 35 * 8 = 280)
So assuming x number of rolls, in order to get every single R or above jobs maxxed out, it takes effectively 16 * 13 + 12 * 13 + 6 * 8 = 412 Rolls.
I won't bore you and waste time doing actual probability/advanced math calculation, but let's add the assumed % chance:
You are looking at 35.7% chance of maxxing out all the R first
40.2% chance to maxxing out all the SR first
24% chance for all the SSR.
The above basically translate to 75.9% chance of spinning gacha maxxing all the R and SR jobs first, which consists of 364 rolls and the equivalent of 500 yen * 364 = 182000 yen or the equivalent of $1555 USD as according to google.
Em, no thank you~
Now let's go with the ideal situation, all UC and R jobs are maxxed from basic gacha
- UC 20 Total (Due to basic gacha, cost effectively 0)
- R 16 Total (Due to basic gacha, cost effectively 0)
- SR 12 Total (12 / 0.33 = 36 * 13 = 468)
- SSR 6 Total (6 / 0.17 = 35 * 8 = 280)
So you are now looking at 12 * 13 + 6 * 8 = 204 rolls.
62.5% chance to max SR first, 37.4% chance to max SSR first.
So there's a good 37.4% chance that you will get all the SSR maxxed just by spending $872 on the game.
Anyways:
The game's great as Freemium depending on luck, but whaling it out really isn't the solution.
(Even though I probably spend more than the above on Aigis & other game over the span of 3 years)
Heck, earning enough money at work to whale it out, I think, is probably the better way to go about it.