Too pissed off to even find out if this has been discussed before ....
I swear, if my Follower, Uthgerd the Unbroken (suggested alternative name: ... the Ugly), runs across my line of fire when I'm aiming an arrow one more time, I'll .... I'll .... send ugly escort girls to Bethesda HQ night and day!
Could they not have come up with a way for the AI to realize that, when you draw an arrow on a bow, you're about to fire it??
Furthermore, who came up with the idea of YOU being the only person who can kill your own Follower?
Uthgerd survives battles with dragon, bears and multiple Falmer only to be taken out by ... yours truly with one arrow!
So frustrating as I have to reload because she's carrying a shedload of gear for me .. and she doesn't natter on constantly like Mjoll, so I actually like adventuring with her.
Is this silly AI behaviour too deeply embedded in the game code to be fixed with a future patch?
My solution to this problem was simple:
1. Wabbajack my follower every level. My follower gets more HP, becomes stronger, levels up, does not die as easily...especially when i hit him/her on acciddent.
2. After Wabbajacking follower...ignore who your follower engages and work on someone else...Wabbajacked followers like Lydia can tank Drauger Deathlords single handed...no need for me to help or babysit them...i just let them tank...
3. always give your follower a few healing potions to carry...they will use them..thus when their HP gets low they will heal themselves preventing you from killing them accidently...