What about Beastmaster?

[Elnidfse]

I'd like to be able to tame monsters that level up. If you've ever played Jade Cocoon on the old PS1, something like that would be incredible for FFXIV's beastmaster. I loved that game so much.

While I love Jade Cocoon. That was less of a collectathon and more of an all you can fuse buffet while you mess about with inheritance rules and create your teams of stone cold killers. While fusing would be an interesting concept I'm not sure it would fit. Unless you mean creating an interactive way to capture these things