In my experience teleportation has never been something that could even be considered weak, even if it can only move you a few feet away. Mainly because it’s too easy to use as an excuse for being able to dodge all and anything by teleporting at the last second, and getting out of situations where your mobility is usually hampered anyways like being grappled or stuck in muddy terrain. 

Literal smoke bombs and reflective stuff should be fine though. With these two things they can be quite deadly, in a knowledge is power sort of way. I think most people don’t quite understand the effectiveness of something as subtle as a flash of light to the eyes or having your vision obscured.