Keep in mind these are not "ideal" builds, so feel free to experiment and make your own.
Burning Soul Soloer
This build focuses on raising SPI to get a high crit rate for the Burning Soul magic attack.
- (Minimum) 20 PER
- (Optional) CON
#Comment: This is the build I use. It's fairly powerful, though the crits only become significantly frequent around level 50 or so. You'll be able to 2HKO most monsters. To save MP, you can place different levels of Burning Soul in the shortcut bar and use whichever is needed to finish off the enemy. This build is fairly safe in soloing, but is time-consuming not only because of the long cast of Burning Soul but also the 1-on-1 nature of using Burning Soul. It is good for managing MP, however.