what if there was a bomb type that exploded like a shard bomb but acts like the charge attack of the tortofist. it's meant to catch enemies in the center and then they can't out because it counts as impassable terrain while dealing damage. there should be other variants that cause status effects.
the other is a turret bomb. you place it down and after a longer fuse time than usual bombs it deploys an energy turret (I don't know the stats on those so it might need a buff.) it stays until it is killed or until you place another. (MAYBE it has a frontal shield on it like the trojan because you have to depend on a slow firing turret instead of instant damage so this probably won't be OP)
the last one is the airstrike marker. you place it and after a longer normal fuse time a barrage of rockets land on the target area dealing massive damage but in a smaller radius and with a longer fuse. (simmiler to the consumable airstrike item)
This entire thread is just attempting to make bombs out of features that already exist in in-game items