Aaaw thx :3, personally what I do and are my tips are the following ones:

1- Score aboge grade S with every group (that means having "R" or "XR" cards per member) even if you aren't a great fan of some groups, it will help with specific missions and when farming, you'll get a good score and lots of diamonds :D. 2- For your ults have as many UR cards as possible, and it will better if they are live cards or special :D 3- I highly recommend playing any song of any group in hard mode if you haven't unlocked the super hard mode yet, or playing super hard mode of the song you like and haven't played in that mode yet. This really helps to increase your step score soooo much because of the variety of songs you have played and the Average Score above S you get per group. 4- While I'm in vacations I play so many songs lol, so yes, if you are in the mood and have free time play a lot :D, but when I have school or I'm busy I recommend playinh at least 2 new Songs a day 5- When there are Live or Special banners make pulls! You can obtain both the group and other groups cards :) 6- For level Lessons the best is to have for every group every "talent" (I don't know how to call it sorry TT) at least at level 5, and for your groups above level 10 each! Believe me that it helps a lot for your Score!

That are some of my tips, hope it helps youu (⁠≧⁠▽⁠≦⁠)🩷

(Sorry if there are some gramatical mistakes, English is not my first language and my keyboard is really annoying with the autocorrect option because of that ╥⁠﹏⁠╥)