I agree about heavy guns, but that only applies to three ships (though I do find that the three four engi build is better for the Spire, but let's please not get into that). And I know the mortar's often brought up as an example of a light gun that needs multiple ammo types, but buffed vanilla (never forget the power of vanilla rounds) gives close enough DPS to greased to the point where there isn't really a difference, and it comes without the lowered projectile speed. Plus you can use the buff with lesmok at longer ranges.
