Treasure Hunter Testing

[Insaniac]

I like thinking about it like this:
TH1 = Regular items.
TH2 = Rare items.
TH3 = Ex items (like seals in Abyssea)

And then when you get an upgrade it just boosts those or something.

Doesn't work like that. There is a noticable drop rate increase between TH1 and 2 on all items.