I've been on a Command and Conquer kick lately, so these suggestions come from a few too many hours playing C&C: Red Alert. I was considering how to most accurately represent the Ranger and the Medium Tank, both Allied Units. The former is essentially a Jeep with an MG and the latter is a glorified, up-gunned and up-armored Light Tank. Both the Light Tank and the Medium Tank only have the one gun, best represented as the MAV, but the up-armoring is something I can't duplicate. In Red Alert, the Medium Tank is about 30% tougher overall, which incidentally is how much of an improvement my proposal for Improved Light Vehicle Armor would be over the regular stuff. This Improved Light Vehicle Armor would protect well against LAV, Bombardment weapons up to Heavy, but would fall quickly to MAC and anything with AP values better than it.
The Ranger, that is the MG toting Jeep, well it's really hard to represent in the current model. It's a fair bit more fantasy too, if I'm going to be honest. I figure the best way would be to have a new vehicle class and so I came up with the Ultra-Light Vehicle. It would be a little tankier than Infantry in terms of Hit Points and a little better off in terms of armor, but would suffer from a near non-existent Fortification Value, making them almost useless in a defensive role. Their main draw, like the Red Alert unit that they're base on, is S P E E D. They would have a Hit Mod of 0.2, making them very difficult to kill in the offensive role. To balance out this fantastic element, they have a few problems overall. Their armor is 1.25 or 1.5 Base AR at best as they are unable to mount anything heavier. The former let's LAC kill them 3:1 while HCAP kills them 3:1. This means INF armed with HCAP can kill them by the droves, while Light Vehicles with LAC or HCAP can also come out on top... ton for ton that is. This is further restricted by forcing Ultra-Light Vehicles to mount INF modules only and limiting them to just one Slot. A niche unit, but after a good bit of tinkering I thought it'd make a good, and far more importantly FUN, addition to the game.
I could forsee Ultra-Light Vehicles representing helicopters or Sci-Fi VTOLs of similar frailty, popular RTS standbys like the Vulture from Starcraft or maybe even some flavor of Drone.
As always, feedback is welcome.
--- Ultra-Light Vehicles w/ Ultra-Light Vehicle Armor: Ultra-Light Vehicle Armor would have 1.25 Base AR and would be available to Ultra-Light Vehicles and heavier. Ultra-Light Vehicles would have 2 Hit Points, a 0.2 Hit Mod, a 1 Max Fort and a 0 Max Self Fort. Ultra-Light Vehicles would have a Size of 8 and One Slot for modules. Ultra-Light Vehicles could only mount modules that INF could mount. Ultra-Light Vehicles can only mount Ultra-Light Vehicle Armor or Improved Ultra-Light Vehicle Armor. Ultra-Light Vehicles would be a separate technology, requiring 1,000RP to research, to better represent the very niche and/or more fantastical applications of such units.
--- Improved Light Vehicle Armor & Improved Ultra-Light Vehicle Armor: Improved Light Vehicle Armor would provide a Base AR of 3, while Improved Ultra-Light Vehicle Armor would provide a Base AR of 1.5 which is identical to Powered Infantry Armor. Improved Light Vehicle Armor and Improved Ultra-Light Vehicle Armor would fall under a technology requiring 1,000RP to research.