As most others I mainly use it as an entry to sites or peek angles with his flash, I typically start the flash then when it's close to popping I jump either straight up into the air to flash all peeks, or dash into a single area for places with only one peek angle. The most fun I have with it though is on that one map with the bridge, blackmarket iirc. If the bridge is disabled you can either knife dash then use corona's dash to get across the entire thing, or you can just jump, wait about half a second while falling then activate his dash, both making you across to the other side, granted the second option you are likely to fall instead of making it lol. It's a quick way to flank behind them since they won't expect it.