In any group sports, you have to figure out in advance exactly what kind of shots you need to get if you're the official tog. All general wide shots, or lots of crystal clear close-ups, or both (usually the case in group sports)?
Where will the competition be held? What time? What will the lighting conditions be? Will be be allowed free access, or are there space/security restrictions? Will you have a high vantge point to shoot from, and from a further distance? Will you have multiple opportunities to shoot the same routine? Will you be allowed to use multiple remote strobes if you set them up further away? Will you be able to shoot full-dress reharsals at the actual venue? Will you have an opportunity to get intimately familiar with the team's routines? What kind of budgets are you looking at if rentals/assistance is needed?
Once you get the answers to those questions, especially lighting and shooting limitations, choosing suitable lenses and equipment set-ups will be a much easier task.
We can't tell you off-hand because we don't know the actual shooting conditions, or arrangements. If you want a Maggie Mee answer, it would be a super fast Ultra Wide 15 or 17 to something f/2.8 zoom, and a super fast 2.8 telezoom, as well as a body that focuses super fast super accurately in bad lighting conditions, but that won't guarantee good results.
Additionally, you could Google 'Photographing Cheerleading competitions'. If the competition is going to be held indoors/in questionable light, search topics covering shooting sports in auditoriums.
Planning in advance and preparations is crucial to predictable and good results in these situations.
All the bset.