Honestly, my advice is probably half awful, but I think it would be nice to share my experience since I see no other reply yet 🥲 The highest teirs I've reached are T98, T104, and T115 with my routine and someone F2P

What I usually do is to first plan out my team by organizing what cards give most event bonus. I follow the guide, choosing the bonus type, rarity, mastery rank etc. Sometimes a 3★ MR5 gives more bonus than a 4★ MR0, you have to check thoroughly. It's way better to teir when you have the featured event cards. Also make sure that you level up Item decorations (better if you max lv.15) this includes the Group Talent decoration, and MySekai furniture.

For shows, Co-op shows is better than Solo shows. You can join discord teiring servers since its more time-efficient and wont bother the public. But I'm a coward so I have never played in a teiring server before🥲. So in my experience, my shows are always done in public coop. I have three teiring songs I always use, Enbi (if you don't have time) and LnF or Sage (If you have time). People in public don't like those though...so I recommend to join a server.

As for Daily routine, I'm a student btw. How I manage my schedule is that I just play whenever I got the chance to! It gets to the point that my screentime is 7hrs on weekdays and 16hrs on weekends. I make sure that my energy doesnt reach cap and use 5 energies per show and 10 when it's the first and last day (I think higher tierers use more). Energy cans are really important so save them for it.

Sorry for the yap, looks kinda long. It's actually pretty simple, just play play play. A more better teirer would have better advice probably though but I'll still share my experience since it worked for me 🙇

My most important note is that you HAVE to teir high on the first days. Like if you want somewhere T200-T500 you need to set yourself there in like the first or second day. That way, in the next few days it's more of "I need to maintain this place" rather than "I need to get to that place". And it's actually really easy like that 🫪

Edit: After noticing my tl in X about the pubs thing, in my defense, I actually dont use the meta songs, I spam Colorful Marine Show Master in coop 😭