The firepower of the Sentry Project, now named the Amaranto, did not disappoint!
Ves, Gloriana, Juliet and Ketis did everything they could to maximize the firepower of their first expert rifleman mech design. They gave up so many useful features and gave up the opportunity to strengthen many different parameters in order to specialize it to the extreme.
Despite its stronger-than-average resonance shield, it was poorly suited for mid-range flanking and skirmishing action. Its flight system and other mobility systems were solely meant for positioning and repositioning, not dodging and weaving through enemy attacks. Just because it was able to move faster than a heavy mech didn't mean it could dogfight!
