If you are getting there for opening and can get on one of the first few Iron Gwazi trains start there, if you are further back in the crowd instead start with Cheetah Hunt, then go to Cobra's Curse and Montu.
Next go to Pantopia and ride Sand Serpent, Scorpion and Falcon's Fury.
Go to Congo next and ride Kumba and Congo River Rapids (if you want to get soaked).
Continue to Stanleyville and ride Tigris, Sheikra and the log flume (you can get soaked but not as bad as the rapids.
Then finish at Morocco where Iron Gwazi should have a much lower wait time by early to mid afternoon.
After that you can go back for re-rides and to other rides that won't have a long wait like the train and see the animal exhibits.