Copying this across, I realise that I haven’t actually written a proper, in depth summary of the Spy’s arsenal. I’ll do it at some point :) Of course, your loadout is personal taste and you should go for what you enjoy playing with, but these are my opinions on how to maximise kredit. Anyway, without further ado:
First, my personal opinion; go for the amby for your gun, the vanilla for your knife and either the dr or the vanilla invis watch for pda which one will depend on both which you prefer using and the situation. Obviously it’s both down to taste and situation (I know a lot of people who swear by the enforcer, but 102hp in one shot is too good to pass up for me), but i find this is the best allround loadout.
The enforcer is a straight upgrade when you use the DR and it used to be my favourite weapon, but again-102hp with a well aimed amby shot beats it hands down. The Saharan Spy set, once you get the first disguise, is absolutely marvellous at taking out sentry nests, and if you use the DR with it the sets downside is only very rarely relevant.
I know a lot of people consider the spycicle the best thing ever, but those ice statues are distinctive (and call out ‘burn that spy a bit longer!’ to every pyro on the map) and while 15 seconds might not seem like long, that’s 15 seconds without your (arguably) best weapon. But by all means try it out.
Other weapons: The Kunai is still a very viable knife to use, but it’s a love it or hate it thing for most people. The big earner is asking a huge health cost for increased cloak, despite cloak regenerating pretty quickly already. Avoid it. The L’etranger is a better cloak regeneration device (And used in the SS set above), although with the damage penalty it has i know a lot of people avoid it like the plague. The diamondback i find doesn’t rack up crits efficiently enough to be worth using, especially when amby crits are both guaranteed and also give you a really smug feeling.
Overall, just experiment with the loadouts; take into account what i’ve said (or don’t), but choose only what you find fun to play with :) I’ll strongly recommend you watch these videos, because stabby is an absolute spy god and makes fantasticly informative videos.
Also, when you unlock the cloak and do-nothing, throw it in a fucking bin where it belongs because it is the worst watch in the universe and i wish death on every scrubber who decides to use it >:CCCC