There's so much to take into account to be a good Sniper.
I say the most important thing about Sentinel is your positioning. This is key to EVERYTHING. With a good position you make impossibly hard shots, easy. You need to position yourself so on the main routes the enemy is travelling directly away or towards you, especially for back to fronts. If you do this you nearly completely negate 1 of the axis of travel, you only need to worry about height really because the turn speed for skiing is slow. Always move around to try and get the best position for where you team is saying the capper will be coming from, if they say back to front for example, you gotta make sure you're in a spot where they're going to be going directly away from you on that route so you can pick them off easy.
Next is low sensitivity, a given really.
Always have your crosshair where you think an enemy will be, not where they are. Your crosshair should be somewhere where the enemy will pass through, and if needed you make slight adjustments to the placement, my last montage was a good example of that:
When you get more confident with shooting, you can try more twitch shooting:
At long range, always try to predict where they're going to go rather than twitch, but twitching is a good skill to gain after lots of practise.
The best way to learn to twitch is your sensitivity, I do it in every game, I have a spot on the screen I aim for, may be a barrel, or an enemy, I'll keep the crosshair away from them, then try and snap it to that spot with a quick mouse movement, if I overshoot the target, sensitivity is too high, if I undershoot the target then it's too low, adjust it accordingly.
Another 1 is to only fire when you think you will hit, kinda a tough 1 to grasp, but if you need an extra second to line up that shot and make sure that, that capper isn't going to change trajectory, take that extra second. Only fire when you think it'll hit, especially if it's the last shot you'll get on them before they're out of line of sight.
Just practise, practise and more practise. All there is to it. Takes a long time, it's hard to snipe on this game at first, I miss a lot of easy shots too, so don't be discouraged. When you get good you'll have people coming at you all game, you will **** them off, big time, if you notice in some videos I kill people who are pathfinders, and then again as another class, it's because they will specifically hunt you down. That's when it gets fun.
Thanks for the advice
I'm getting better but I feel like the low spec of my PC is hindering me as I have such a low FPS most of the time. I think I **** off plenty of players because nearly every game I play I get at least one player on a mission to inf melee me to death

On some servers I have had up to 3 players making it their mission to destroy me
I have got reasonable positioning on most maps, and enjoy a higher hit rate because of that (thanks to the advice of the flamboyant team)
The main thing for me is I just cant seem to master hitbox position on moving targets (if indeed they even have hit boxes). This is the case on a lot of shots I take that appear like they should hit but dont. What I need is some help with WHERE to shoot, and where to place my crosshair in different situations. Does inheritence affect sniper rifles?
I appreciate its supposed to be a hitscan weapon but a lot of shots I miss and then think "no way" because on my screen it looked like it should hit.
Does anyone know what kind of netcode Tribes uses? Quake 3 arena netcode, which is what I am used to, is quite simple and involves the player compensating their aim for other players' lag/trajectory/movement and whilst there is some server side prediction of clients, its not brilliant. But I have heard of other netcodes, like in CS where the server predicts shots fired on targets, and if the target is lagging it auto corrects the data so the shots fired 'hit' where they should even if the target players movement is laggy or erratic. Its a kind of advanced prediction.
One of the type of shots I often miss is on players using jetpack to go straight up and then 'hovering' whilst changing direction. Often my shots appear to pass through them. Is this possibly a bug in the netcode? I have read that there was/is a bug in the netcode that means when using the jetpack on and off quickly the server does not predict the players position like it should. See below:
OK, so to try and help with my aiming, I have mocked up some scenarios in some pictures below (dont laugh at my art skillz

). The reason for this is that when watching youtube vids of snipers sometimes they dont put their crosshair where I expect them to, yet still get a hit. This is the main thing I need to learn, and I believe is the key to accuracy and consistency. Whilst I am starting to get a feel for the falcon, I'm just not getting it on the sniper rifle at all. Some shots I hit some I miss. My aiming is smooth enough, so the only thing I can think of is that depending on a players speed and direction relative to me, I have to shoot at a different spot in order to hit.....?
Finally having looked through quite a few videos I think I am going to change my load out. I am going to go back to the BTX1, and run with frags instead of claymores and the energy pack to allow greater movement. I will run with perks ultra capacitor and quick draw I think.
What do you think to that loadout?
The Phase rifle is not working for me, because it nerfs movement. In fact most of the time I get into a duel I am a sitting duck due to phase rifle energy drain and I cant even make a run for it because of that. I think in terms of duelling, the ability to move/escape + falcon is going to make for a higher success rate than being able to hit with the phase rifle unscoped but then being a sitting duck when I switch to my falcon.
I have a question about the close combat perk too. Is this worth taking instead of ultra capicator? I'm often suffering from 1 hit melee kills by infs. Now if I had fully upgraded close combat would that make life harder for them? Or, would it roughly work out the same if they also have fully upgraded close combat (they have double damage melee)?
Finally, I watched a video where a sniper has turned off fog effects - but he was on crossfire. Is this recommended? One thing I find is that there is a deep 'haze' of fog like stuff on maps like katabatic and temple ruins that obscure mid to long range targets. Would disabling fog effectively remove that? If it does, it would certainly make enemies easier to hit!
Cheers
Buff