What the heck: I'll give it a try.
Here's a Crab. it's not a good Crab, mind you. But it's about as good as you're going to get under these circumstances.
Speed got dropped to 4/6 because Primitive. From there, we retain the 50 tons of the original, rather than drop to the 45 tons the Night Chanter did when it went Omni. Armor is more or less maxed out, and because heat is crippling when combining Clan weapons with single heat sinks, I went simple, with 3 ERMLs and 1 uPL, where 16 SHS actually manages the heat well enough.
Crab II DC
Mass: 50 tons
Chassis: Standard Biped
Power Plant: 240 Fusion
Cruising Speed: 43.2 kph
Maximum Speed: 64.8 kph
Jump Jets: None
Jump Capacity: 0 meters
Armor: Primitive
Armament:
1 Micro Pulse Laser
3 ER Medium Laser
Manufacturer: Unknown
Primary Factory: Unknown
Communication System: Unknown
Targeting & Tracking System: Unknown
Introduction Year: 3145
Tech Rating/Availability: F/X-X-X-F
Cost: 3,405,000 C-bills
Type: Crab
Technology Base: Mixed (Advanced)
Tonnage: 50
Battle Value: 1,098
Equipment Mass
Internal Structure 5
Engine 240 Fusion 11.5
Walking MP: 4
Running MP: 6
Jumping MP: 0
Heat Sink 16 6
Gyro 3
Primitive Cockpit 5
Armor Factor (Primitive) 162 16
Internal Armor
Structure Value
Head 3 9
Center Torso 16 24
Center Torso (rear) 5
R/L Torso 12 18
R/L Torso (rear) 4
R/L Arm 8 16
R/L Leg 12 24
Right Arm Actuators: Shoulder, Upper Arm, Lower Arm, Hand
Left Arm Actuators: Shoulder, Upper Arm, Lower Arm, Hand
Weapons
and Ammo Location Critical Heat Tonnage
2 Heat Sink LL 2 - 2.0
Heat Sink CT 1 - 1.0
ER Medium Laser CT 1 5 1.0
Heat Sink LA 1 - 1.0
ER Medium Laser LA 1 5 1.0
2 Heat Sink RL 2 - 2.0
Micro Pulse Laser HD 1 1 0.5
Heat Sink RA 1 - 1.0
ER Medium Laser RA 1 5 1.0
Features the following design quirks: Easy to Maintain