Isnt it faster to lightspeed dash the rings at the start of the level and spinkick the fire box? im not sure becuase i dont see that trick in the speedruns and i just accidentally did that in my personal playtrhough, maybe it could be tried. I dont know, but glad if this helps :)
if we are talking about mission 11, this could help for the IL with gems (assuming lightdash doesnt stop red gem from working), but definitely without gems it is faster to use the method already used in the gemless IL. i couldnt get the lightdash to be fast enough for the exploding boxes to destroy both front robots, so the optimal strat is still a slightly delayed spindash through the left front robot and into the explosive box.
someone should test this out in the gems IL, because i do think lightdash speed will be faster than spindash speed, and with red gem active, destroying the explosive boxes seems to destroy both front robots.
