Fallout 3

[Dark Ultima]

I've never had anyone die. I've always had the 5 stimpacks necessary (or the medicine skill to use Buffout instead) when Garza starts to have trouble. I tell them to wait until I clear out the enemies (not sure if destroying the Eye Probes undetected helps or not).

If you can't reload, try walking Li back around until she triggers something. Or use the console, revive all the members and see if she responds.