» Mon Feb 15, 2016 4:11 am
There's a lot of theorycrafting about luck in this game. In actuality luck affects the frequency of events out in the wastelands. Many people mistakenly think it affects caps, but in actuality you get more caps because you get more events, with most of them being "found sum caps, yo!". Basicly, depending what weapon you give to your explorer, your optimal luck number is well below 10, in my studies I have found that a dweller with M.I.R.V. In hand does best with 4-5 luck, if all other attributes are maxed. Your optimal situation is dweller picking up his 100th item and thus turning home with 1hp left. This is because you get the better equipment the longer you stay out there, but a dweller with maxed stats and gear-boosted luck/endurance is likely to fill up and return with most of their stimpacks unused.
In short, luck increases amount of events when exploring, endurance increases your healthpoints and reduces radiation damage, and weapon you carry determines how fast you kill stuff / how much damage you take (fewer die rolls to kill a target means fewer damage rolls taken).
Having said all that, legendaries were all but removed from the game with patch 1.2, so no amount of tweaking your exploring is going to give them anymore. My guys stayed out for 8+ days (lvl 1 with maxed stats except for luck equipped with Power Armors and M.I.R.V.s), and at most brought back a few rusty plasmarifles.
As for rushing, with 60 luck between 6 workers you get a rush with 0% fail, you can pretty much get through the "rush 146 rooms" -types fastest by only doing those. If you gear up above 60 luck the next rush will be only few percents and I find anything below 10% fail seems to be just that, with above 10% almost always failing.