I know, late late late, but...
According to my observations, every single wave in Imperishable Shooting is aimed to a point. The first wave is more or less static, assuming you don't move until the shot is fired. I've noticed on that wave you can more or less dodge a single tap to the right and all the way down, then move straight up once the ring expands past halfway and make it through.
After seeing the second wave over a hundred times (and probably 200 more before I cap it once), it's obviously not static at all - the two bursts are slightly off-center, and the second wave moves around.
Third wave is more or less static in terms of positioning, but the burst points change depending on your position.
Fourth wave is the same.
Fifth and sixth waves have their burst points slightly offset, so you can go in.
Anything beyond that... *shrugs* Haven't gotten past wave 6 yet.
