Not with the method I described? Most people get way more than 158SP a day.... I run a site called XIVPads which tracks player progress, and over an active 160 daily updates to provide results, i can tell you people earn FAR MORE than that a day. You get almost 100k just from linking broken water leves 3 times...... Go do some more leves get about a solid 130k, then go craft a bit or do a lower level job since you'll be in fatigure on your main.
So easy to level.