Alright, I've re-configured my command structure and slightly modified some of my designs. First, here are the unit designs:
Light Platoon Command Mech
Transport Size (tons) 10 Cost 4.94 Armour 20 Hit Points 16.0
Annual Maintenance Cost 0.62 Resupply Cost 0
Headquarters: Capacity 50
Basic Genetic Enhancement
Boarding Combat
Desert Warfare
Extreme Pressure Combat
Extreme Temperature Combat
High Gravity Combat
Improved Genetic Enhancement
Jungle Warfare
Low Gravity Combat
Mountain Warfare
Rift Valley Warfare
Non-Combat Class
Vendarite 0.04
Development Cost 247
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Light Squadron Command Mech
Transport Size (tons) 10 Cost 1.48 Armour 20 Hit Points 16.0
Annual Maintenance Cost 0.19 Resupply Cost 0
Headquarters: Capacity 15
Basic Genetic Enhancement
Boarding Combat
Desert Warfare
Extreme Pressure Combat
Extreme Temperature Combat
High Gravity Combat
Improved Genetic Enhancement
Jungle Warfare
Low Gravity Combat
Mountain Warfare
Rift Valley Warfare
Non-Combat Class
Vendarite 0.01
Development Cost 74
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Light Supply Mech
Transport Size (tons) 10 Cost 49.44 Armour 20 Hit Points 16.0
Annual Maintenance Cost 6.2 Resupply Cost 0
Logistics Module - Small: Ground Supply Points 100
Basic Genetic Enhancement
Boarding Combat
Desert Warfare
Extreme Pressure Combat
Extreme Temperature Combat
High Gravity Combat
Improved Genetic Enhancement
Jungle Warfare
Low Gravity Combat
Mountain Warfare
Rift Valley Warfare
Non-Combat Class
Vendarite 0.4
Development Cost 2,472
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Light Automatic Rifle Mech
Transport Size (tons) 6 Cost 29.66 Armour 20 Hit Points 16.0
Annual Maintenance Cost 3.7 Resupply Cost 1.3
Improved Personal Weapons: Shots 1 Penetration 15 Damage 12
Basic Genetic Enhancement
Boarding Combat
Desert Warfare
Extreme Pressure Combat
Extreme Temperature Combat
High Gravity Combat
Improved Genetic Enhancement
Jungle Warfare
Low Gravity Combat
Mountain Warfare
Rift Valley Warfare
Vendarite 0.24
Development Cost 1,483
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Light Pulse Rifle Mech
Transport Size (tons) 12 Cost 59.33 Armour 20 Hit Points 16.0
Annual Maintenance Cost 7.4 Resupply Cost 6
Crew-Served Anti-Personnel: Shots 6 Penetration 12 Damage 12
Basic Genetic Enhancement
Boarding Combat
Desert Warfare
Extreme Pressure Combat
Extreme Temperature Combat
High Gravity Combat
Improved Genetic Enhancement
Jungle Warfare
Low Gravity Combat
Mountain Warfare
Rift Valley Warfare
Vendarite 0.48
Development Cost 2,966
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Light Pulse Cannon Mech
Transport Size (tons) 20 Cost 98.88 Armour 20 Hit Points 16.0
Annual Maintenance Cost 12.4 Resupply Cost 9
Heavy Crew-Served Anti-Personnel: Shots 6 Penetration 18 Damage 12
Basic Genetic Enhancement
Boarding Combat
Desert Warfare
Extreme Pressure Combat
Extreme Temperature Combat
High Gravity Combat
Improved Genetic Enhancement
Jungle Warfare
Low Gravity Combat
Mountain Warfare
Rift Valley Warfare
Vendarite 0.8
Development Cost 4,944
For the unit formations, I have broken up the platoon command structure into greater detail. Front-line light mech units are now organized into squadrons, and each 3 squadrons are assigned to a platoon command post. A complete platoon can fit inside a small troop transport module (250 tons). Squadrons are differentiated by weapon type which allows for weapon mixing at the platoon command level, which is a balancing point that I like. Squadrons carry no extra supplies and rely on their command post for resupply. I recognize that rear-echelon field positioning is meaningless in boarding combat, but I plan on using a similar command system for my planetary assault troops, so I find it convenient to unify these two command structures. Anyway, here are the final formations:
Light Boarding Squadron
Transport Size: 70 tons
Build Cost: 298.1 BP
10x Light Automatic Rifle Mech
1x Light Squadron Command Mech
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Medium Boarding Squadron
Transport Size: 70 tons
Build Cost: 298.1 BP
1x Light Squadron Command Mech
5x Light Pulse Rifle Mech
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Heavy Boarding Squadron
Transport Size: 70 tons
Build Cost: 298.1 BP
1x Light Squadron Command Mech
3x Light Pulse Cannon Mech
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Boarding Platoon Command Post
Transport Size: 40 tons
Build Cost: 153.3 BP
1x Light Platoon Command Mech
3x Light Supply Mech
Attached are a couple of screen shots showing the OOB ground combat screen. In the first screenshot I have one platoon with a light, medium, and heavy boarding squadron attached. In the second screenshot the platoon has two light squads and one medium squad which will probably be what I use in most boarding situations. However, the heavy squads may be useful for boarding ships which may be transporting hostile armored forces, such as carriers. I will likely develop more squads of approximately the same size as shown here as I continue to develop my planetary assault forces.