>>720302116 (OP)
It’s funny how people universally act like Spy counters Engineer when it’s the other way around in 99% of cases. In order for Spy to kill Engineer, he needs to:
1. Be either outside Sentry gun range or right next to it while also behind it.
2. Backstab the Engineer and then immediately sap it if you’re doing the approach option
3. Make sure the class who has an enemy detector machine is distracted, and for said class to not have the bring teammates to him machine teleport a teammate over to him
4. And for so long as he isn’t using the YER (the most punishing and arguably worst knife) needs to remove the engineer before anyone else because said class’s sentry gun instantly vaporizes him as soon as he stabs anyone near the sentry (which is most of the time because engineer has teleporters, dispencers, and sentries)
5. When sapping a sentry, needs to also prepare to be hunted down immediately because the sapper alerts the engineer and is really loud
6. Pray the enemy team only has 1 engineer
Once he does that, he can beat an engineer, die immediately after and said engineer just respawns and builds the nest again anyways.