The term huntard comes to mind. You need to get some cc immediately and get some HoTs up. Each of them has an attack power modifier and agility gives AP. The tooltip is not actually inaccurate, as it states: Above that is useless. Let's assume you don't seriously expect me to calculate each player's potential DPS do you? Hit rating issue duly noted.
All is coming to an end anyway once cat comes out. Snake Trap and Frost Trap helps! Use this if you're under your cap and need to get your Hit Rating to cap. If not, reposition yourself and ignore Steady Shot. So one of the common questions in the hunter forum is about starting 80 gear. Just don't let them freecast and you'll be fine. There are a number of abilities that do very well to mitigate the effectiveness of Kill Shot.
Quelmiran's Hunter Extravaganza: MM Hunter Armor Pen Build
You should also have a bunch of PvP offpieces, so that you can adjust your resilience whenever you need to go higher. It will come off cooldown earlier. Double silence and burst, along with Disengage. Just don't hit anything with it on a raid or your friends and guildees will point and laugh at you. This is something that was well-established. Fire Mage - Difficulty 6. You do this to manage range and freely dispel his Sacred Shield.
Also, most warriors will spell reflect because they expect a freezing trap, and pop spell reflect. Force them to use it early, then finish them later. Hunters just need a ridiculous amount of Keybinds so this helps alot! The Priest also has a 5 second silence which is very nice to have. You must use Readiness before or after.