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All great advice above!
What of carefully cutting the armor wire a coil or two above fitting so line wrench fits through?
Cutting both sides would allow easier removal of pieces also final cut as far back as possible would hide end then shot of black when done if leaving other areas untouched?
You may want to V-Grip the Flex side fitting for solid pushing against line wrench also even though you're not heating Flex side, with tools in place ready, a shot of Spray-Freeze carefully on Line fitting instantly before cracking may allow a slight temp difference between threaded pieces so line side shrinks slightly smaller and lets go first try?
If not, it's always worth trying to tighten so any movement can get it working back/forth.
Best of luck w/ everything also YES to the more pictures thing too!
~ Pete
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