You raise a good question. I'll have to take a closer look at the 6e rules in this area.
I created the following Multipower slot for The Martian Manhunter using 5e years ago:
3u 9) Mind Scan 3d6 (Human class of minds), +5 ECV, Reduced Endurance (1/2 END; +1/4), Cumulative (36 points; +3/4) (50 Active Points); Limited Power Affected by Adjustments as an EC (-1/4), Limited Power Not in the presence of Flame (-1/4)
HM