First tournament Sunday - help me build a list please!

So I’ve been collecting for years but never played, my lgs is having a 2000 point tournament on Sunday (3D prints are allowed, I checked), can someone help me with which units are good and which I can forget? Which guys fight well together? Which starhost type should I use? I have - Carnosaur (either rider) - troglodon - stegadon (any configuration) - oldblood on foot - astrolith bearer - starpriest - saurus warriors with clubs x10 - saurus guard x5 - kroxigor x6 (or 3 warspawned 3 normal) - raptadon chargers x5 - ripperdactyls x3 - skinks x10