After playing awhile, Valerian Universe is addicting game. First you need to learn how much credits you earn per drone killed and based on your shield level you need to figure out which coordinates are the best way to move around not losing credits in total (credits received by winning a battle less credits spend for drones lost in a battle).
Glad you like it and find it addicting. The addiction part is the most important part for me as thats what keeps players around for a long time. That and people like me who like hoarding things and just having a massive stockpile of game things to feel accomplished are also great to have for players.
I tried to go more for a strategy type game this time, stuff like how many drones you have and your ship levels determine how well you perform in battles against the rebels and other players ports.
The best strategy to gain credits is to fight rebel drones that are your level so if you have level 10 Ion Cannons and Plasma Shields then you would want to fight rebel drones that match your levels for the best benefit. If you follow this strategy then fighting drones becomes much easier and more efficient but if you fight lesser leveled drones that margin decreases.
I also have it set to where players have a minimum battle zone so they can't just hover around 0,0 the entire game killing drones. It forces players to explore deeper and deeper eheh.