5C FC = 100% curse.
j.C fC should also = 100% curse.
2C FC = 100% curse. learn all of those dive cancel loops, they're character specific.
Usually, you want whatever > j.236C > c bug hit, d bug hit > j.C > j.214C > d bug hits up > j.236C repeat.
In some situations, you won't want the j.C or whatever, if it looks like the combo is going to drop, you can use other things to pick it up.
Also, j.C doesn't work on Carl, so you just j.214C instead, to push him forward, making sure D bug continues to hit, and will pick up off the ground.