If you have /blu and a Saurian helm or Wyrm armet, solo Greater Colibri. Watch out for links.
If you want a challenge, cap your wyvern's HP on Greater Colibri first, then try and solo a Wivre. Makes for great fun, trust me. Bring some Tavnazian tacos for these though, and make sure you have cocoon up full time. The only thing that makes them really difficult is when they use Boiling Blood. You pretty much have to ride two trigger spells back to back because of how fast and hard they're hitting. Usually a double attack, and having them both be critical hits means the fight is over.
If you don't have /Blu(which I didn't at first either), and you have maybe /Whm or /Rdm for example try Sea Puks at mamool ja staging point. Still very nice exp, but I find their strong knockback moves and AoEs that can damage your wyvern make them more annoying than Greater Colibri.