Question: Is there a Bomb that applies persistent damage on the splash too?

1st Bomb: Bouncing Boom (Has levels like other Bombs). You gain a ( 0/ 1/ 2/ 3) to attack rolls. When you use this bomb you can select up to (2/2/3/3) targets and make an attack roll against each. The targets must be both in the bombs range and no more than 10 feet away from each other. Enemies hit take the bomb initial damage and trigger splash damage around them. Creatures can only be affected once by the splash damage of this bomb, regardless if the were in range to take it more. The bomb deals (1d6/2d6/3d6/4d6) fire damage, (1/2/3/4) fire splash damage.

2nd Bomb: Banshee's Blow (Has levels). You gain a ( 0/ 1/ 2) to attack rolls. This bomb deals only (1/2/3) sonic splash damage, this might have two different ways of working. a) Make a Demoralize attempt using your Crafting bonus instead of Intimidation against all creatures affected by the splash. b) If you hit the main creature's Will DC with your attack roll, it is Frightened (1/2/3) (same duration as Demoralize). On a critical it is Frightened (2/3/4) and all splash creatures are Frightened 1.

Tell me what you think of the bombs. How would your word them out and if they sound good. As well as what level would they be on each bomb version.