> if you are unlucky you may need a third
False. If you are unlucky you may need a fourth. If you are lucky, you won't need a third. Average is three.
Saying this because I barely ranked all gears for Emma with 480 bios. I had 2 bios left when all her gears were 20. If I were just a tad bit more unlucky, I would have needed a fourth buy.
Damn, yeah I was unlucky I guess. But I am sure there are people that needed 4, sometimes RNG is a bitch. If I needed one more gear upgrade, I would have needed a 4th pack, so it's likely that someone else had to buy a 4th. An alliance mate of mine had to get 500 Ghost Panther bios to finish his gears, so it happens.