Nerfing Allen was a mistake
There's a massive difference between the show and the comic imo,and I don't see why there had to be one.
Allen in the comic was a TANK,soaking up damage and drawing the attention of multiple Viltrumites.
Show Allen is locked in one vs one's while covering Zoe Tech Jacket. I don't mind Zoe's role being given more weight,but Allen's strength didn't need to be changed at all.
"The sinlak darts helped make up the gap for Allen."
That's pretty boring,dart to Viltrumite flesh and GG? What if the Viltrumites used their fighting skills to overcome this? What if they just dodge?
"Allen was too strong,we don't need someone one shotting Viltrumites."
Why not? In the show, IIRC ,the purge shows Kradd casually yanking heads with the spinal cord. The Comic and show both tell us that not all Viltrumites are the same strength,so nothing really changed.
And taking care of Allen isn't a problem,just jump him. Which we know is valid,cause that was the COP's plan for Thragg. Comic Allen got jumped to the point Anissa could hurt him,so wearing him down is just fine.
"How does Nolan even stand a chance in their fight then?"
He doesn't,but Nolan should have higher Battle intelligence and more refined combat skills to not get completely low diffed.
I just don't think Allen's strength was an issue at all.