With the crashes, I focus on certain pops and they are limited, saving beforehand makes it safer.
Honestly the fps boost while they are away kind of makes it worthwhile even if it crashes 1/5th of the time, particularly because I usually have too much already set for my Dwarves to do, limiting task completion unless I back off. So I afk and if it crashes I lost no real work.
But, yes that can be hella annoying, which is in part why I started this thread XD.
I never risk raiding elves at this point (they seem to crash oodles more).
Though as for dwarves that die, with the sheer size of the squads sent out I barely see deaths.
Maybe one or two at the beginning, before I had enough time to armor them all and set up loose training regimens (2 in every squad allows for sparring, the discipline boost makes stress far less scary (EDIT: Imma call this the Isreal tactic)), but now with a strong tactician all I see are dead war dogs. I see more damage in the retaliatory attacks on my civ.
(Though with 3 legendary squads that's usually limited to a 1-3 wounded Dwarves, and the sick reports afterwards make up for it. Heads. Goblin heads everywhere. And even then only if the traps dont get reloaded)
(BTW after every raid you get attacked by the civ in retaliation. its a good way to mine goblinite, or elf... wood? (idk why'd you want this but some of you weirdos probably do

))
(Edit: btw its actually pretty easy to set a fort-wide military. The military screen will tell you if a dwarf is in another squad as you put them in squads. So you set up maybe a civilian uniform and a true military uniform, set the normal military squads up, and then fill in the rest. Added bonus in creating class specific squads, like planters, mechanics, or high-profile (too important for battle) dwarves. This information is also readily availible on the military squad fill screen.)