I think the devleopers have come around full-circle in nerfing everything, and now most of the strong builds that used to allow you to carry a game don't work anymore. Let's share them here now that we don't need to worry about them getting nerfed!
(1) Rapid Fire Mode + Survivor instinct
Rapid Fire Mode used to decrease reload delay by >60%. Survivor instinct decreases it by 50%. They stack linearly, so you end up with an artiliery crusier with 0 reload.
(Not actually 0, it actually falls back to the 'weapon cooldown time' instead of the 'weapon reload time' on the datamine. But the cooldown time is also affected by RFM)
This was good on the Murometz. You get ~8 shots out of it over 6 seconds, totalling ~50k damage. And you keep the shields on as RFM3 didn't drain energy.
This was harder to pull off on the Onager, as it was very fragile, but the damage was insane. The weapon cooldown time is only 0.225 on the Onager, so the effective max DPS was 5250/(0.225 * 0.3)=77.7k.
Now it doesn't work anymore. Even the RFM5 is only 40% reload boost, so you get combined 90% reload boost.
(2) Storm missile + module reboot + desparate measures
Store missiles used to do enough damage to secure 1 kill per salvo. Desparte measures resets both storm and module reboot, so you end up with 4 uses of storm missile. This has lots of uses: the you can use the second salvo to down someone who used anti missile pulse against the 1st salvo, for example.
(3) Koshei / Aion + adrenaline shot
Energy to weapon actually increases energy with adrenaline shot. I played this for 2 days, and then it got nerfed, so didn't really know all the stuff you can pull with it - mostly saw this on the other side where an aion took the combined firepower of our entire team, including drain or purge, and lives, and heals back to full after 2 seconds.