If your going to learn to be a good scout, you're going to have to practice your sidearm and melee skills if you're going to have a chance when you do get on a flag. Personally I'd avoid using gas under those circumstances because you are playing to the assault class's niche. The trick with gas is that an assault player can use it, don their gas mask and have no weapon penalty for a class of weapons that are already the best CQC weapons. For other classes I'd suggest the incendiary grenade is a more logical area clearance choice and will probably get you more kills.
Or a frag..
Tactics wise I'd be looking at learning where to give your teammates cover from when you are off the point (for each map and objective), and when the right time for you to join in the objective capture is, and when you need to be getting back out into the field to provide your team with cover again and which direction you should be going to achieve that (often not with the main zerg).
Also it doesn't seem like it, but k bullets can really help your team out with vehicles. You'll barely ever get the kill, but what you can ensure is that a damaged, retreating tank is unable to repair as you keep pinging it. This will allow your assault and support players to swarm it.
And don't be the selfish sniper, spot the enemies for your team. Winning is the name of the game not having the highest KD on the server.
Or a frag..
Tactics wise I'd be looking at learning where to give your teammates cover from when you are off the point (for each map and objective), and when the right time for you to join in the objective capture is, and when you need to be getting back out into the field to provide your team with cover again and which direction you should be going to achieve that (often not with the main zerg).
Also it doesn't seem like it, but k bullets can really help your team out with vehicles. You'll barely ever get the kill, but what you can ensure is that a damaged, retreating tank is unable to repair as you keep pinging it. This will allow your assault and support players to swarm it.
And don't be the selfish sniper, spot the enemies for your team. Winning is the name of the game not having the highest KD on the server.