How should Tonberries be implemented?

[Elexia]

not exactly the same but keep the idea of vanishing and sneaking up behind to stab us in the back kind of concept. It'll keep us on our toes. As seen here FF7 Crisis Core - When Giant (& Little) Tonberries Attack

http://www.youtube.com/watch?v=9YLJmJDHmU8

They also did it in FFXI, probably the most feared Tonberry for quite a while lol.

[Dragon]

It's a shame caps probably won't increase for quite a while. It'd be doable at 50.

While doable at 50 as it is, simply a bad idea as eventually, tonberries could be regarded as midgame content, and get nerfed just like cactuars got nerfed (100 needles? please; they should never have been so low-level to begin with). It'd be better to simply wait and release tonberries as Lv.70+ mobs (even if the cap is still 50), and hell I'd say give them their own expansion too (c'mon, Revenge of the Tonberry King sounds like an awesome exp pack!).