I'd be King Behemoth. I may not be exactly the most powerful monster in all existence, but I'd have a heyday running around and killing.
First I'd stop by Qufim, it's right there, and just pwn everybody, then run to Jeuno and kill everybody standing by the AH and hope I can escape before the JP players get to me. Then I'd rush to Valkurm Dunes. Marchelute train? Hahaha, nothing compared to me.
I'd also race in the Tour de Elshimo, even if I lost, I'd still win ^^. After that I'd probably just hang around at the entrance of Garliage, waiting for my snacks to appear at each train, just grab somebody now and then and just eat them.