You're slightly overrating Mancini...he would have a fight on his hands with Gatti. Your contentious posting style belongs in the General Forum.
Mancini did actually show a jab in the second Bramble fight, however, Bramble also stood right in front of him and did not go southpaw like he did in the first fight. Every time Bramble went lefty in the first bout, Mancini had zero idea what to do and he was strafed by lead right hooks and uppercuts.
I think more highly of Mancini than most. I think he chews up Gatti, he is the level above IMO. He is also stronger and hits harder IMO. Mancini basically punches him around but Gatti's heart keeps him fighting and it interesting but Mancini would force a stoppage by the mid rounds.
It'd be a good scrap, but I think Mancini was just a step above Gatti. Skill wise there was nothing Arturo could do that Ray couldn't do better. Mancini could outslug Gatti, outbox him, and IMO could just do whatever it took to beat him. This doesn't mean it wouldn't be a great fight though, Mancini is the step in class above Gatti, but I think it'd turn into a brawl real quick with Mancini winning in a decision or a late TKO.
I think I'd even take a Mancini around the time of the Camacho fight to beat a best you could find 135 Gatti.