1: skye’s flash; the reason to watch out for the flash is that they are able to get info, blind you being guided, and blind you and get info.

2: k.a.y.o.’s ultimate: when you hear his skrillex concert ult that removes yoru switchy switchy beacon. So, kayo cannot be killed by anyone who has terrible gun play. His greatest utility combo is impossible and adding lineups, = screwed player.

3: k.a.y.o.’s flash: he has a very quick flash popping time. On top of it, it lasts forever and is very hard to spot.

Reddit, feel free to add other things.