Yes it has Forerunner engines and technology integrated, but its done with human understanding. The Prometheans from Requiem were capable of slipspacing themselves onto the Infinity, thus bolstering our understanding of Forerunner technology is not entirely what we seem to think it is. Besides, doing hit and run tactics inside a fleet of 700+ ships by yourself would be suicide because even if Infinity took the time to deploy its units in the thick of things, all ships would focus fire on the Infinity because it would be in deep without cover from both the UNSC fleet and SMAC wall and would be severely overwhelmed. In the time it took for Infinity to spool up FTL while firing its guns, it would probably be obliterated by over a hundred energy projectors (charge time for MACs, point defense turrets and firing of rockets would not be instantaneous).
Do you remember how quickly that emergency slipspace transition was?
It entered and exited slipspace in less than 2 seconds.
Also when Infinty exited slipspace above requiem, Remember how it rammed that cruiser, putting strain on its shields, had enough energy to deploy frigates, and a metric butt ton of missiles.
Also forgetting that Infinity has enough/missiles powerful enough to destroy a (possibly shielded) destroyer.
Also i cant remember infinities exact slipspace deviation, i think it was about 1Km, the covenants was nowhere close because they don't use AIs to utilise them to its full use.
