So many forums about smash.
Lets see why this is a good ability:
Lets see its disadvantages
:Takes time to get 4 stacks of singularity
So high damage, instant ability and low cooldown. But takes time to gather four stacks and is negatable.
Three positives and 2 negatives. If you get rid of 1 positive it becomes a balanced ability. I recommend getting rid of the of the instant ability so you can see if their casting it. Or they can get rid of the high damage so it doesn't matter that it's instant. The low cooldown doesn't matter because of the taking time. This is all that this ability is and needs.