Not sure of what class to start...

[Salvosa]

I agree, combo monk. They are extremely sp efficient. You can deal huge damage at higher levels, flee many monsters and never drop a single sp except to heal yourself. Which also means you'll never need healing items of any kind. Once you hit 90-95 I highly reccomend changing to OI though, since seals are only good for so long. Technically you can trans on nothing but seals, but I dont understand how people stay sane doing that.

Edit to address Namine: Monk is not that bad. Enough agi for 95% flee, enough dex for 100% hit and The rest in str. Int isn't a huge factor for a combo monk because they dont use active skills asides heal/buff. You'll never need a huge heal amount since you'll be fleeing most of the attacks done to you unless you get mobbed.