I like being a good player in all game modes. Grand arena might be your favorite mode, but once that gets stagnant, build some teams for special missions in TB or learn some unique counters in TW to boost your banners. Set some goals for TB and challenge yourself to a new record of waves completed. I feel like doing those things have really helped me better understand and enjoy my roster
Don't farm the old ships if they are going into LSB, its just a waste of energy. Its better to have yes mod than no mod, so upgrade some shit mods if you don't have any. Don't hoard any relic mats except R9, you will always get more from MKIII later. It's still better to build something for your guild to stay in a good one instead of having a shit guild but building your own stuff bcz guild resources helps a lot. This is video is great for late game players but not really fits for newbies.