For BGT definately try to ride SheiKra first. The lines for it get really long in the afternoon, but are actually pretty good at openning and in the evening. I went on it four times on one day in June with no more than a 30 minute wait because I hit it at the right times.
Since SheiKra openned, Montu's lines have been dramatically shorter. Since Kumba, SheiKra, Python, and Scorpian are all in one area, you shouldn't have to face too long of lines for Montu.
I believe that Gwazi Lion is down for rehab right now, although it may be back up when you show up. Kumba is down for rehab and a new coat of paint, but I'm not sure if they're done with it yet, it may be opened by now.