(Again, sorry this one is late, I fell asleep in the middle of writing it)
Spy is a very tricky class to use. A lot of Spy gameplay revolves around your enemy not knowing you’re there, and when they do inevitably notice you, the jig is up and you need to have something to fall back on. You can try to go for a corner stab or a stairstab, but those are tricky to pull off, and it’s best to just pull out your gun and shoot them. There are two main revolvers that are the go-to options for Spy: the Ambassador and L’Etranger. The Ambassador gains guaranteed critical hits on headshot, so it’s good for a Spy who’d good at aiming while moving, and if you can trick your opponent into chasing you in a straight line, you can easily kill them if you know what you’re doing. If you want to go with a safer bet, L’Etranger is the better one because it helps you recharge your cloak quickly if you get caught with your suit pants down. Since most Spies use the Dead Ringer, and that can only be activated at full cloak, the 15% cloak on hit is a useful thing for a Spy to have. Even more so now that they have removed the set bonuses and given L’Etranger a 40% longer cloak time on wearer.