add tier 3 harvesters and structures to add diversity and produce more money than basic harvesters
the nod faction could benefit from new harvesting structures, as the stealth harvester is very capable of surviving the late game, being able to avoid units like the mammoth tank and the juggernaut using stealth.
a possible structure could be a refinery that uses small drones to harvest tiberium. this structure would be placed in the middle of the field, and the building animation would be a drill coming out of the ground, then splitting into 8 segments forming a star like shape. each segment would be home to a small harvesting drone. these drones carry 1/4 as much tiberium as harvesters but they are much faster, and since their refinery is in the middle of the field, they have less distance to travel to unload. the refinery would also have a repair drone that repairs damaged drones. also, if the cultist and/or mastermind/prodigy return, the harvesting drones would be immune to mind control. this structure would be available at tier 3, ranging from 4000-5000
the gdi lack an effective harvester, the weaponry they are equipped is fairly useless in the late game, so why not fore go weaponry in favor of faster harvesting
the hydra harvester has nine harversting arms that harvest 1/3 as fast as a normal harvester, all the arms in total harvesting 3 times as fast, the hydra would benefit from a 33% larger storage capacity, but suffer from sluggish movement.an upgrade would fix this maybe bringing its speed to around 60% to 75% as fast as a regular harvester.
the scrin homeworld is likely covered in tiberium, so its was logical to use mobile refineries to mine the fields of green. the scrin mobile refinery looks like a shortened and widened PAC that hovers closer to the ground than its fighting counterpart, it carries 4 drones that mine fairly quickly, though not as fast as the nod drone harvesters. its main feature is allowing standard harvesters to deposit their loads there. removing the need for outposts which allows you to put more defenses into your main base, instaed of secluded expansions.
names for the nod structure and scrin mobile refinery would be appreciated
also any other ideas are welcome
adds depth to harvesting instead of sticking with the same old harvester and refinery.
reduces the need for a massive amount of arvesters and refineries in the late game
not completely balanced, yet.
th packked up nod octo refinery(still need names!) this drills out of ground the splits into a octagonal star