The answer may seem obvious to some (read: most) of you, one way or the other, but I'd like to see the answer. Now before typing down your answers with an unnecessary 'dur hur' attached, please listen to my argument. I'm of the opinion that the Final Getsuga Tensho is a technique. Most people assume that when Ichigo is placed 'at peak', FGT Ichigo used, i.e., this.
My opinion differs in that when Ichigo's peak is called, I think of this.
Now, the counterargument is that FGT is a 'mode', therefore when Ichigo is called 'at peak', FGT is assumed, and thus, it can only last a few minutes, when such time is up, that power expires. My opinion is that FGT is a technique, thus, not a mode, and therefore not his 'at peak' form, thus he can fight indefinitely without risking loss of his powers provided he doesn't use that specific technique. So: Is FGT (the top picture), a mode, limiting Ichigo's powers at peak to a few minutes at most, or is post-Dangai Ichigo (the bottom picture), his 'peak', and FGT merely a form he takes to 'charge' the technique before firing it?
I apologize in advance if this really is unnecessarily nit-picky or unclear. But the argument was started elsewhere and I wish to see objective answers.