No. Macros can't make decisions based on health. Q: But what it I... A: Still no.
Some people sort of fake this by keeping two bars - one with Mutilate and one with Backstab - and manually switching between them at 35%, but the key word there is "manually". I also think its a bad idea in general, as you will sometimes need to throw some Mutilates even below 35%, so having both keys available to you strikes me as generally a positive thing. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.