Needing some advice for going against certain killers

For Springtrap, pay attention to the little number panels on the front of the doors (especially if the door happens to be facing toward the generator). If you see it start to flash, that means somebody is about to come out through the door (usually the killer). You can use this to get a head start getting away or potentially hide. The flashing starts as soon as he selects the door to teleport to, so you basically have 3 seconds from the moment you see that until he'll be fully through the door.

With myers early on you need to keep an eye out for him. More so than most stealth killers because other stealth killers will try to get hits, even ghost faces usually try to get close or they'll telegraph their mark while miles away and give you chance to make distance. Meyers will just stand there watching.

once he hits tier 3 do your best to hide, prevent him getting those quick downs. In chase when he's powered up looping him is incredibly risky, best just to make as much distance as possible and predrop pallets to try and make it to the end of his tier 3 timer. His thing is he's weird because he spends much of the match not chasing but building his power with brief bursts of aggression when he hits tier 3. It's a very odd pattern.

Deathslinger is a killer I play a fair bit. First off you need to watch that terror radius, you really want distance on a slinger to make his shots harder, bear in mind a lot of slingers (me included) run stealth builds for easy shots so don't rely too hard on the tr, keep your head on a swivel. Be careful of vaults and pallets, if he has a loaded shot they are a golden opportunity for an easy hit, fake out and if he misses that gives enough time to drop the pallet or vault through before he can recover and m1. His shot is relatively easy to dodge with a bit of practice, he takes a moment from ADS to being able to fire, and that is the point you want to disrupt his LoS, a bad slinger will go for snap shots so if you see him ADS just jink, my favourite trick as slinger is to mindgame ppl with the ads to make them evade and lose distance to me, then M1 them or get an easy shot at close range. Use the environment, solid cover and objects are your friend, open areas are a nightmare, make sure he doesn't have a round in the tube before you try to transfer to a new tile. Looping him can be punishing if you get it wrong, but high walls are a god send and if you crouch at low walls he struggles to spear you. If he misses a shot he must reload and this slows him so take the opportunity to get that distance back. Another thing to remember about slinger is he suffers a similar issue to legion, if he can't reel you all the way in for a free hit, the spear can only injure and deep wound you, not down you, keep a solid pallet dropped loop between you and him and he can't get the hit. Conversely some slingers will simply aim to tag you in a chase and break the chain to get the free damage. Basically his biggest weakness is his single shot mag. The rythmn of his chases is bait the shot, if he misses make distance, if/when he does hit you

Springtrap I havent seen very much of but his mechanics seem very similar to alien and demo. Watch those doors, and keep a wary eye out while you are working gens, as you should with any stealth based killer. Listening helps, it can be hard to hear them moving over the sounds of working a gen particularly one with the pistons going, but you can still hear audio cues (I think he makes an audio cue when using a door, not sure, like i said not too familiar with him) and watch the player list if he's chasing someone then crank that gen, if he stops and you don't know where he is, take a moment, hide, check the area and the closest door or try and spot him across the map. Info against any mobility killer like springtrap is invaluable. If you swf make sure everyone calls out his locations so you know when it's safe to work gens.