Manny was a valued friend of Tony and a great shooter, if he kept him alive, the hit squad would be history. Also, if Tony hadnt killed Manny, Gina wouldnt of went histerical, and perhaps she could have provided a kill or two. Also, if Tony had opened the door for Chi Chi, he would of been able to provide his services. So fi Tony had done (or not done) these things, he would of survived the hit and perhaps a Scarface II would have been made.

check this....
tony could have survived the hit even if he didn't have manny... when the guy shot gina and tony pushed him off the balcony and kill him..tony realized that a massive hit squad was on the premises and he ran to get his ar-15with the grenade launcher he could have made his last stand from his office balcony and stopped tehn from every gettin in his front door and no one would have sneaked up on him.....also if gina hadn't locked the door behind her chi chi and the other guy could have come in tony's office and gotten better guns and more ammo and they could have helped tony keep anyone from even makin it to the front door if someone hade gotten past the three of them they would have seen that and one person would go by the door and make sure no one got in...sun tzu and common sense tells us that one man can kill any amount of opponents if the opening his opponents have is so small that they have to come in one or two at a time ...and he has a high powered automatic...so at the very worst ..one would man the door and two would fire from the balcony of tony's office..the ycould have even had one on the blacony(tony) one at the door(chi chi) and have the other guy justsupplyin them with extra clips cuz i'm sure tony had a lot in his office...poiint is if he hadn't been high on coke he would have realized gina was dead and he would be tryna to save his and his workers lives instead of talking to a corpse...heck i could even go into how if he had celebrated with manny and gina he wouldn't even have been there and he an manny could have found out the next day and gone after sosa....now that would have made teh ultimate sequel...dreams

....he could also have just turned around and shot his assassin! I think with the amount of coke in him he would've stayed alive for at least couple more hours even though they had turned him into swiss cheese!

mayb if he thought "how did that guy get on my balcony" and looked for the grappling hook n threw it away , his assassin wouldnt of climbed up , in his shades , n shot him in the back

i think tony killing manny and talkin to gina's corpse shown ow paranoid he was and how insecure he had become , but it could of just been the excessive amount of coke

he had alot of coke in him that
was probably the main thing

He could have survived no problem if only the script had said so