You brought up the dart challenge, so I thought you were talking about how you would be able to throw 3 darts in a row and splat somebody. I suggested the dart->dart interval nerf to make this strategy less effective.
I don't understand why you're saying that it will feel worse to trap and combo with. Can't you use repeat frames (like you mentioned
here) to only change the interval between consecutive darts and nothing else?
As for the tripwires, they only last 2 seconds so I don't think it'll be too much of an issue, since with the nerf I suggested, by the time the third dart is out, the first one only has half a second left. The tripwire damage could also be lowered to 15 or 20 if necessary.