Heres my screenshot getting hit by BLOOD in Jot, im using mostly defence and health. My new knowledge is Fortress & health. 

 Im pretty sure if my troops total defence & health is not greater then 2x (not sure exactly when you take fewer losses?) of their total offence that you take critical damage in defence. lvl 40 knowledge must be crazy.

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Stronk OS, use to lose 185mil T4 to them at palace 35. 90mil T4 to normal T7 OS

Heres my visible troop stats for reference. Hero/shamen were home

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