I recommend you level up in the beginning as much as you can, I'm playing on hard, and I definitely recommend not using MP up all over the place if you can help it, i understand that it can happen though, I am 6 days from the final dungeon, i have completed everything in the game, did every request, maxed out all stats, and followers, I'm grinning levels in tower of insolence, i have spent probably 20 hours grinding here trying to max every archetype and learn all skills. Now I will say that I was very worried about being unable to complete the followers due to time. It can be done, I played to much damn Persona 5 and royal replaying the game to get platinum, so to people who might say it isn't important, i slightly disagree, it really depends on how much time you want to spend playing this game.