I run hacking scout but haven't yet gone to proto because it's such an expensive suit that if you die 4 times in a game, you're not likely to make a profit (unless it's a PC battle).

I'm currently using the gallente adv light suit with 2 complex hacking mods and a std uplink. I rake in the WP on the hacks and those spawn points are really damn useful - when I get the lvl 2 uplinks today, I'll even be able to fit an adv scrambler/SMG (I run with both to save CPU/PG). This fitting leaves me enough room to have a couple of std shield extenders too, so a little extra protection.

If I ever see a game mode that provides more isk return (other than PC) the proto scout will be amazing and I'd go something like - 2 hacking mods, 1 speed mod, 1 stamina mod. The armor repping suit in the post above me sounds cool too.

As far as I am concerned scout is dead. I still run it because I hope CCP eventually fixes something. You can play SG scout but know this - you will do way worse than assault with a SG. You can snipe but so can everyone else, except you wont be able to tank countersnipers. You can try knives but for every kill that you score you will be killed at least ones by a back pedalling red dot laughing in your face (for those who use knives - you know what I am talking about). You can try scaning but logis will have less problems with it. Scouts used to have an advantage with scanning profile, range but now passive scanner is so badly broken it does not matter anymore. Bottom line: there is just nothing in this game that you would do better as a scout than other suits.

PS. If you really want to be successful as a scout you should start calling in the free LAV and run ppl over - this is the only viable scout tactic.