In the game, as usual survival hunters have some of the highest threat and won't have salvation buffed but it will hurt your misdirect threat and you already have three paladin buffs that are more important but as a hunter you do get feign death on a 30 second cool down. However as your damage improves you will find that just using feign death when needed and not planning ahead can get you into trouble, especially since feign death has a 17% resist rate (it's based on spell hit) and even with the improved feign death talent you can only get down to a 13% resist. Note that you can get up to 130% threat on the tank before you will pull agro at range (110% if you happen to be 10 yards or closer) but it is still best not to spend any significant time above the tank, especially because threat meters are inexact and feign death is buggy and prone to resists. You should of course make sure to be running a threat meter, Omen is the one used by most guilds.
In general, the rule for a hunter is to feign early and often, especially a survival hunter. Usually you want to get a good solid chunk of DPS in at the start of the fight after using your misdirect and making sure the tank is in position and hitting the mob and preemptive feign about 10-15 seconds in when you are riding the tank. That way if you get a resist, you will be able to feign again sooner rather than later. You will have to adjust the timing of your first feign death based on your personal threat output and that of your tank. If your feign resists, take it easy a bit, switch to auto shot only or stop shooting entirely if you are too tight with the tank threat and be careful till your next feign death cool down is up. Even if your feign doesn't resist, you may still find yourself catching back up to the tank before your second feign death, so keep a close eye on threat. Once you have gotten off your second or third feign death unresisted you should be in much better shape on threat, but you should still periodically throw in an extra feign to be on the safe side. There is also a known bug that sometimes a feign will resist but no notification will appear and threat meters won't be able to detect it, so those occasional extra feigns help hedge against that bug somewhat.
On threat reset fights or fights where the tank threat can drop, you have to be especially careful as the traditional hunter benefit of having a complete threat drop is weakened by the high initial threat you will put out and the likelihood of resists on feign death.
When you would normally fit in a special but ideally when your special cool-downs are not up, it's the best time to make use of your feign death after your steady goes off so that your rotation can continue smoothly as soon as you get up. If you find you are having a difficult time tracking your feign resists you should make a habit of staying feigned until you check your threat meter and verify if your threat did in fact drop- it will cost a little DPS but it's a good way to train yourself to get into the habit and eventually once you get better at managing it you can get up more as quickly as possible.