36 mantle @ 5c = 180c
100 Fresh vital for 180c to the chrysominter for 2.4c each is 240c.
There’s some spark cost but depending on how you get it it’s negligible. Mantles are disappearing from shop stands all over so I guess at times of change there is a bit of a PVP element.
I’m still finding them for 3c and I haven’t even started on the tens of thousands available for 4c. I probably won’t.
36 mantle @4c = 144c though and it makes 240c worth of essence. I might.