Editing Hunter guide (section)

===HP management===
Hunters tends to attack from a much closer distance than other classes. This means you are the main foes' lure.
You can rely on your Mag's invincibility trigger to reduce the risk: either know in advance [[fixed attack damage]] and exploit them, or use packed monsters and sacrifice your HP to drop under 10% in one Sword/Partisan swing. The later requires a solid accuracy and at least 4 targets in order to work (read: 10% HP Mag Trigger Exploit). You can use Monomate and Dimate (200HP/500HP respectively) to set up invincibility in Ultimate, it is far from being a useless tool.

Hunter's meta requires you to stand really close/against monsters at very low HP. That's why getting used to the previous points and making use of them is important. No risk, little reward; high risk, high reward. You will often be the leading person as you will be ahead of other players, meaning that you have to remember the spawns not to get any bad surprise. Use Gifoie/Twin Blaze to stop rushing enemies and Rabarta/Freeze trap/Arrest to control the crowd. With the correct gear and knowledge, you are the most efficient class in the game as you have the ability to spawn-kill almost any monster.
When you start practicing, it feels like a die and retry game. Worry not, dying is learning. Analyze what went wrong, how you could do better with another positioning/combo and try something else next time. That's pretty much how you improve at this game: questioning and practicing.