After much grinding and rage, I have finally defeated my first Ex boss: Koishi!
Amazing! I'm surprised that was your first. Congrats!
Random Phantasm attempt, had a perfect run all the way to the end of BoLaD. And I do mean the end of it. I don't have a replay because 1) my replay list was full, and 2) I somehow messed up "Danmaku Bounded Field" as well. But damn, I had no idea I could get that close.
Oddly enough, I think Phantasm is the easiest extra stage of all time. (Ran's extra is harder) I've also had a near perfect pretty far into the stage. I reached all the way to the spell Ran Yakumo without using bombs and without dying, but some borders were abused, especially on Double Death Butterfly (which I believe is her hardest spell, since I have yet to cap it)
The reason I died on Ran Yakumo? Because of: 1. rank, and 2. because I didn't pay attention to every single bullet because they were moving faster than I anticipated.
On a side note, I've reached DBF without deaths but had no bombs left, so it was a one death run. Still trying for no deaths, but Ran's opener keeps stopping me.