It's always possible, just depends on how fast you want to level up.
You need more SP for more skills. If you're doing few skills, you won't need to worry about this, but chances are, you're gonna learn at least 4 - 5 skills from the Rogue class and at least 1 - 2 from Bard. In that case, you'll have to SP Farm. Just make your highest mastery level a few levels below your combat level. You'll level up slower, but you'll get more SP (Skill points) to spend on skills and can learn more.
The bigger the level difference, the more SP you get per level, and the more skills. Experiment a little till you find out how big a level difference you need and then theres no more worries
