Sadly for Solano, I seems miss the event cause have some problems and need to take a breather at that time.
Actually my Shiho is perfect unit maybe I will try to up her a bit later cause I'm currently lacking silver to CC and AW so I think maybe after I AWed my Iris, I will try to upgrade her. Ah and I also have some Shiho leftover from her event. Is it better to make the 2nd one or just wait until something that can give Crsytal when you sell Gold+ unit in DMM?

For units that buff drop rates, well I do have Monica but still long way to make her awaken cause she's not even CCed so maybe I will AW her later after some of my main unit(Healer and Archer especially)

Yeah bad luck, I don't have a good tank other than Leanne so only can use her as my main tank and Garrett only used him for backup tank.