I almost hate to remind people of this, but remember that not everyone's getting accepted. I'm going to select a few new people who I think would work best for the story, then that's it. At best (and because I'm so incredibly nice), I'll probably allow for rejected characters to have oneshot appearances, where they'll either 1) leave to continue the fight elsewhere, 2) remain behind while the group moves on to continue the fight, or 3) die gloriously/horribly. Then, we'll do it comic book style, where if a character is popular enough amongst the existing the players, they can appear again or even stay on.
In terms of danger for the Sentinels, it's a general rule that the lower the Sector number is, the more dangerous the territory. The "outer" Sectors are pretty much all the same (constant risk of death or crapture). The "inner" Sectors which directly border Sector Zero are the most dangerous, with possible turning into guaranteed confrontation. Sector Zero is just guaranteed death.
Also, whenever you tell me you've edited something, I'm paying attention. If I don't say anything, it's usually because I don't see anything wrong with what you've changed yet.
"A pistol is a tool to save people. It's not a weapon for murder.
" "Then save me by killing them!
" "That's kinda contradictory...
"My Characters' Endings