It will be enough. Make sure to use all dailies, rebates and events to their fullest potential, because most of the time using events correctly gives you more income than recharging small ammount for monthly card. That being said, if you do mentioned, you should easily end up in top3.

Lightning/fire are the easiest ones to level to 60, then you get the option to change class. Id lean towards lightning, because you c*e guy, iruka and blitz through everything. Fire takes extra turn there, but is insanely annoying early with his mirror and debuffs in the kit.