By that logic, the Repbulic fleet has become a superweapon as it is suicide to fight it openly.
Not exactly. It was the Republic fleet along
with Revan's ability to lead them that made them dominant.
I'm being very serious to say that ALL that Traya has to do is sit on Malachor and she wins. Revan can't bombard her forces, he can't starve her forces, he can't fight his forces ('cause his own will go insane), and he can't beat Traya herself because she's in a nexus of the dark side.