IG instinct, IG Rad Pro, Pro Tour 630, PT57 a/e.
All these are super soft. But soft isn't just a indicator of something that will be pleasant to play with. Sometimes you need some stiffness and firmness to even things out. Just because something is sweet doesn't make it delicious.
To accentuate softness place a rubber (not silicon) dampener. It will get really soft on ya.