Hunters are afraid of you when you're not garbage. Period. That 30 second head start is more than enough time to secure a stage 2 and armor if you play your cards right. If you're feeling pressured because you have to hit stage 3 to have a shot in hell of winning. You're not good at monster, or at least not yet. Every monster can easily win a stage 2 fight if they know what they're doing. Hunters have so much sticking power to prevent idiots from getting to stage 3 where a brain dead monkey could put up a fight.
Now that I'm done laying down the bottom line of "get gud". Here's some basic tips.
It doesn't matter how much they can track you. Spam smell, constantly look around you while doing so, particularly while feeding and you can pan the camera without actually having to turn around. You are faster than they are, if you see them coming it's far too easy to plan an escape right and dip in a timely manner.
Stop doing nothing but running if you get domed. All you're doing is boring the snot out of everyone, and taking free chip damage. If at stage 1, keep moving but use your ranged attacks or hit and run tactics to disorient and chip at the hunters while you wait the dome out. When the dome drops they should still be reeling giving you time to make distance, break line of sight, and sneak away. If not then keep chucking crap at them as you run, I promise, you will slow them down either by knocking one down, or stirring up some vicious wildlife.
If stage 2, fight, smash them, go for an incap or 3, you have all that armor, use it, once that runs out resume stage 1 tactics. Odds are though if you're capable you can end it here or at least inflict enough strikes to make a second fight at stage 2 or a fight at stage 3 an easy win.
Slim can't heal himself for crap but prevents aoe healing well. So target the hell out of him, or force a separation, 30m is a lot but It can be done. His healing is also entirely dependent on him being able to shoot you, like of sight him and take your target down, he won't be able to heal for anything.
Laz can't heal for anything but if you down anyone but him you either have to make it count by eating the corpse, or only down the trapper so you can make a break for it.
Caira has somewhat weak single target healing(and pretty sure her self heals are weaker compared to her heals on other) so drop her first.
Val has next to zero self healing. Break her face. Honestly her healing on others is somewhat lackluster as well though so you can really just focus burst down anyone.
If they have a hank/sunny. Target them first. Their ability to save someone is too powerful to ignore.
It's not 4v1, its 4v1+wildlife. The fauna are far more aggressive to the hunters than monsters. Use this to your advantage. Pick a fight near a nomad/sloth/tyrant/armadon/trap jaw pack, I promise they will help more than hinder. Or use them in your escape, run/leap/fly/roll/warp right by them forcing hunters to waste precious jet pack fuel to avoid them or take a hit for it that you can capitalize on.
And probably the least said but most important. Pay attention to the hunters with smell. Stay out of line of sight, but stalk them occasionally. You'll be surprised just how often one gets brought down to half health, or stuck in a plant/megamouth/tyrant, or even incapped. That's the perfect time to strike. Not only is one out of the fight, they'll be horribly disoriented and scattered.
These tips in mind and you'll see that how sticky hunters can be, isn't the problem. There are some things about hunters that could probably use some tuning, but tracking/trapping is definitely not one of them.