Chlorophytum blasts open the way, melting a heap of rubble in the way. However, this leaves her depowered and even turns Ikuno's hair white. Given though that we previously see Chlorophytum perform a full power attack without depowering or Ikuno getting crippled though...
...I'm pretty sure this has to do with the magma energy itself and VIRMs interference, or something along those lines. Meaning outside that? Chlorophytum is more than capable of pulling this off just fine, and has done so. Previously I calced Strelizia to be 54.969m tall.
1 pixel = 54.969m/550 = 0.0999436364m
0.0999436364m X 50 = 4.99718182m
Scaling from Strelizia to Delpinium to the corridor.
1 pixel = 4.99718182m/364 = 0.0137285215m
0.0137285215m X 564 = 7.74288613m
1 pixel = 7.74288613m/173 = 0.0447565672m
0.0447565672m X 2662 = 119.141982m
Now to scaling the dimensions of the attack.
1 pixel = 119.141982m/1199 = 0.0993677915m
0.0993677915m X 941 = 93.5050918m
93.5050918m/2 = 46.7525459m
= 2*atan(941/(1612/tan(70/2)))
= 0.539683688 rad
= 30.9215975945318178 degrees
Enter that through the angscaler and the closer end of the melted rubble is 169.03m away.
= 2*atan(430/(1612/tan(70/2)))
= 0.251446322 rad
= 14.4068130247232382 degrees
The hole at the further end of the tunnel is 369.91m away. Now we can get the total length of the melted metal.
L = 369.91m - 169.03m
= 200.88m
Volume of the tunnel as a cylinder (obviously).
V = πr^2h
= π X 46.7525459^2 X 200.88
= 1379421.86m^3
= 1379421860000cm^3
Energy to melt steel is 7309.87 joules/cm^3.
E = 1379421860000 X 7309.87
= 1.00833945e16 joules
= 2.4099891252390057694 megatons
Final Results
Chlorophytum blasts opens a path = 2.41 megatons