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I've got nothing to say exept why are you two debating over something so frivolous as this?
#1: Zero did tank the Zero cannons explosion, not the beam directly.
#2: even if he did tank it, it is irrelevant ultimately.
#3: No, Standard canon Gouki cannot bust a country, unless it's like Fiji or something. The name of the technique is irrelevant to what the technique actually does.
That's half of the reason.
The other is that Igniz is just GODLY powerful. He alone could probably withstand Shin Akuma's strongest attacks (he'll likely lose though).
Together with his subordinates, I see NESTS overpowering Akuma.
I just can't see him get pass through Igniz + Zero and his clones at the same time. Too much power, it's over 9000.