For Elite Campaign : Max out Accuracy, Shell speed, Shell damage , Reload Speed. Put only 5 points on Firing speed and no points on ammunition at all. This way you won't have to worry about having downtime waiting for the main weapon to recharge its shots. As for turrets i went full flak cannon 5-6 of em and a freezing ray placed in front of them. This configuration is a cookie cutter for the elite gameplay. Of course in combination with maxxed out winged bombs , airstrike and support fire. Hf!
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Gambling has it cost, this is why it has to reduce omega, otherwise will be a win-win situation and break the game balance