Here's some tips from a Day 1 Hunter: 1) Don't stick something with a Tripmine if they're remotely headed towards you. The 'splosion is bigger than you'd think. 2) Your invisibility is a godsend. Use it and abuse it. 3) People can still see you if you blink strike them in Crucible. 4) PvE enemies will still attack the location they last saw you if you go invisible, so be careful. 5) Blink cancels your invisibility, but double jumps do not.