Hannibal at Zama

Could Hannibal have done anything more to beat Scipio at Zama? I'm talking on a tactical level. I'm of the opinion of Lazenby, with the forces he had he used all his old genius he just didn't have the materials. He expertly negated Scipio's attempts at hitting his flanks and did his best to make up for his cavalry deficiency. He used his third lined as a clear reserve and tried to break Scipio before his cavalry came back and nearly did so.

What? He couldn't rush in with his third line their were two lines in front, feeding it in would take away its decisiveness. The cavalry battle took all of two minutes or so. The cavalry were absent due to Scipio's cavalry chasing Hannibal's routed cavalry. His cavalry was attacked by the Roman cavalry after a few rogue elephants disturbed its formation. It was never out of sight until it was defeated. Hannibal was not waiting for his cavalry. He was doing all he could to finish the battle before Scipio's victorious cavalry returned which nearly worked.

Its possible yet if the elephants weren't even trained and were very young whats the chance theyd get armor?

There were very few slaves compared to Spartacus' time during the Punic War and Hannibal could ravage thr countryside as he chose which is where the slaves would be. Which Italian cities? If Ertruria or the Latin cities had revolted that would've had a huge impact.