Glossary
Fast hit
In one line: A quick attack on a site at the start of the round, before the defense settles.
What it means
A fast hit (often called a rush) is the opposite of a default: the team goes straight to one site, all together. It bets on the defense being spread out early, on defenders not yet being able to support each other, and maybe on someone still walking to their spot.
It works best with movement abilities and quick utility, and above all when it is not predictable. Do it every round and the defense will stack three players on that site and make you pay.
An example
The defense has been rotating a lot in previous rounds. At the start your team runs to B with two flashes and a smoke: you arrive before the second defender is in position and plant within 25 seconds.