As interesting as Venerable Vincent's 'Tiny C' may be, the appearance of a miniature copy of the C-Man did not fundamentally ease the difficulty of getting past the enormous phasefighter screen.
It served more of a distraction than anything else. It was not until the Tiny C moved in coordination with the C-Man that it started to produce more results. The two worked together to pincer their targets or make it more difficult for them to slip away.
The miniature construct controlled by Vinny was also able to take advantage of the space suppressor mounted on the larger expert mech to quickly tear through the defenses of the same phasefighter.
The expert mechs still had to struggle to eliminate and outpace the special phasefighters that were specifically designed to counter high-ranking mechs. Precious minutes went by as the powerful machines no longer held back as much.