What's the optimal team composition?

I didn't have much time, so I pushed through and finished, but I don't know what the best team composition was. I was stunned to see someone getting 30 million event points per run! I think the bonus points + lane score & fever run are likely to increase, but with my current setup, I only have the 'explosion' option, so it was no different from usual. Honestly, I don't get why bonus points are given twice for P but not for WB, and I have a lot more to say, but you ladies just have to punch your way through (talking about scores). Thinking about team comps makes me tired, so I usually just go with Shin or Mokuren's explosion to solve it, but it's not great. Depending on the chart, I might not be able to handle it. But Shin's explosion feels great because it blasts away 12 bars on the right! This time, if you only look at skills, I feel like KPC allows for various combinations. I don't know though. Also, for gacha, I wish they'd release all teams on the first day. I want to complete it on day one, so why do they always split it up?