I like RTS in the Wastelands

You game reminds me somhow of Battlezone.

You should play that game, and see some of its mechanics.
Its an intelligent mix of firstperson shooter and tactical RTS.

The smart thing of battlezone is, that you can make cool missions
using either A firstperson explorer type of mission,
or a "control an army" type of assault mission with
bigger battles.
Also the player can jump into all vehicles (one at a time)
and command the others what to do.
(attack, resupply, defend, rescue me, harvest resources,
build structures)