I used to play Warhawk a lot. We came up with a bunch of minigames. Most of them built up useful skills.
Jeep Launching: This works best on the Archipelago map. Two people start as pilots, and the rest are in jeeps. They have to race from A to B and back. The pilots have to try and knock them off the map. Anyone knocked out becomes a pilot and the final 2 to survive become the starting pilots next round. This built up a good skill, pushing around jeeps that flag carriers are in.
Hide and Seek: Fairly straight forward. One guy is on red and the rest of the group is on blue. Only the red team is allowed to kill. Anyone who gets killed switches to red. It’s not as difficult as it sounds, since if you get in a plane and select the weapon with the biggest reticle it’ll turn red if a target is in the reticle. This was good at building up your stealth strategies and learning the nooks and crannies.
Dodge Jeep: Like the name implies, you’re trying to dodge the jeeps. Typically you start with two jeeps and the rest of the group in a circle. Dead ground units can grab a jeep and join in, which usually makes things harder as they run into each other more than the people they’re trying to run down. Ground units can knife the drivers, who become ground units. Eventually one team is depleted of units. It was good for getting down the timing on knifing drivers, and for learning how much to adjust for ground units trying to get out of being run over.
Jeep Racing: pretty straight forward and the one I was best at. It was good for learning how to take the corners you’d need to take when running the flag.