My idea is cheap but not that squish expendable lights, while able to spotting the enemy.
Zodiac (Standard)
Mass: 35 tons
Chassis: Standard Biped
Power Plant: 140 XL
Cruising Speed: 43.2 kph
Maximum Speed: 54 kph
Jump Jets: Standard
Jump Capacity: 180 meters
Armor: Hardened
Armament:
1 Micro Pulse Laser
1 Heavy Medium Laser
3 Improved Heavy Medium Laser
1 ER Small Laser
Manufacturer: Unknown
Primary Factory: Unknown
Communication System: Unknown
Targeting & Tracking System: Unknown
Introduction Year: 3145
Tech Rating/Availability: F/X-X-X-E
Cost: 5,793,548 C-bills
Type: Zodiac
Technology Base: Mixed (Advanced)
Tonnage: 35
Battle Value: 1,538
Equipment Mass
Internal Structure 3.5
Engine 140 XL 2.5
Walking MP: 4
Running MP: 5
Jumping MP: 6
Double Heat Sink 12 [24] 2
Gyro 2
Cockpit 3
Armor Factor (Hardened) 84 10.5
Internal Armor
Structure Value
Head 3 9
Center Torso 11 12
Center Torso (rear) 3
R/L Torso 8 10
R/L Torso (rear) 2
R/L Arm 6 8
R/L Leg 8 10
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 Jump Jet LL 2 - 1.0
Heavy Medium Laser CT 2 7 1.0
ER Small Laser RT 1 2 0.5
Targeting Computer RT 1 - 1.0
C3 Computer RT 1 - 1.0
2 Double Heat Sink RT 4 - 2.0
4 Triple Strength Myomer RA/LA 2/4 - 0.0
2 Double Heat Sink LA 4 - 2.0
CASE II LT 1 - 0.5
3 Improved Heavy Medium Laser LT 6 7 3.0
Partial Wing RT/LT 3/3 - 2.0
2 Jump Jet RL 2 - 1.0
Micro Pulse Laser HD 1 1 0.5
2 Triple Strength Myomer RA/LA 2/4 - 0.0
3 Double Heat Sink RA 6 - 3.0
Yes you said 4/6 to 5/8, but you don't restrict jump mp, do you? Jump MP of 6 is not that fast, perhaps, but anyway that's faster than most mediums.
Due to its weight restriction it is focused on close combat - both close range as well as melee attack.
Zodiac (SL)
Mass: 35 tons
Chassis: Endo Steel Biped
Power Plant: 175 XL
Cruising Speed: 54 kph
Maximum Speed: 75.6 kph
Jump Jets: Standard
Jump Capacity: 210 meters
Armor: Hardened
Armament:
1 Improved Heavy Small Laser
2 Improved Heavy Medium Laser
5 ER Small Laser
Manufacturer: Unknown
Primary Factory: Unknown
Communication System: Unknown
Targeting & Tracking System: Unknown
Introduction Year: 3145
Tech Rating/Availability: F/X-X-X-E
Cost: 6,147,473 C-bills
Type: Zodiac
Technology Base: Mixed (Advanced)
Tonnage: 35
Battle Value: 1,743
Equipment Mass
Internal Structure Endo Steel 2
Engine 175 XL 3.5
Walking MP: 5
Running MP: 7
Jumping MP: 7
Double Heat Sink 10 [20] 0
Gyro 2
Cockpit 3
Armor Factor (Hardened) 100 12.5
Internal Armor
Structure Value
Head 3 9
Center Torso 11 15
Center Torso (rear) 4
R/L Torso 8 11
R/L Torso (rear) 3
R/L Arm 6 9
R/L Leg 8 13
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 Jump Jet LL 2 - 1.0
ER Small Laser CT 1 2 0.5
Jump Jet CT 1 - 0.5
2 ER Small Laser RT 2 2 1.0
C3 Computer RT 1 - 1.0
2 Double Heat Sink RT 4 - 2.0
Triple Strength Myomer RA/LA 5/1 - 0.0
ER Small Laser LT 1 2 0.5
Improved Heavy Small Laser LT 1 3 0.5
CASE II LT 1 - 0.5
2 Improved Heavy Medium Laser LT 4 7 2.0
Partial Wing RT/LT 3/3 - 2.0
2 Jump Jet RL 2 - 1.0
ER Small Laser HD 1 2 0.5
Targeting Computer RA 1 - 1.0
5 Triple Strength Myomer RA/LA 5/1 - 0.0
Double Heat Sink RA 2 - 1.0
This is faster version, intended to backstab the enemy. It is slightly durable than standard version as well.
Zodiac (LPL)
Mass: 35 tons
Chassis: Endo Steel Biped
Power Plant: 140 XL
Cruising Speed: 43.2 kph
Maximum Speed: 54 kph
Jump Jets: Standard
Jump Capacity: 180 meters
Armor: Hardened
Armament:
1 Heavy Medium Laser
2 ER Micro Laser
1 Large Pulse Laser
1 Flamer
Manufacturer: Unknown
Primary Factory: Unknown
Communication System: Unknown
Targeting & Tracking System: Unknown
Introduction Year: 3145
Tech Rating/Availability: F/X-X-X-E
Cost: 5,245,110 C-bills
Type: Zodiac
Technology Base: Mixed (Advanced)
Tonnage: 35
Battle Value: 1,472
Equipment Mass
Internal Structure Endo Steel 2
Engine 140 XL 2.5
Walking MP: 4
Running MP: 5
Jumping MP: 6
Double Heat Sink 10 [20] 0
Gyro 2
Cockpit 3
Armor Factor (Hardened) 84 10.5
Internal Armor
Structure Value
Head 3 9
Center Torso 11 12
Center Torso (rear) 3
R/L Torso 8 10
R/L Torso (rear) 2
R/L Arm 6 8
R/L Leg 8 10
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 Jump Jet LL 2 - 1.0
Double Heat Sink CT 2 - 1.0
Targeting Computer RT 2 - 2.0
C3 Computer RT 1 - 1.0
2 ER Micro Laser RT 2 1 0.5
Double Heat Sink RT 2 - 1.0
Double Heat Sink LA 2 - 1.0
Large Pulse Laser LT 2 10 6.0
Triple Strength Myomer LT/RA 1/5 - 0.0
Heavy Medium Laser LT 2 7 1.0
Double Heat Sink LT 2 - 1.0
Partial Wing RT/LT 3/3 - 2.0
2 Jump Jet RL 2 - 1.0
Flamer HD 1 3 0.5
5 Triple Strength Myomer LT/RA 1/5 - 0.0
Double Heat Sink RA 2 - 1.0
A fire support variant when your lance lacks other snipers. Unlike the other kin it cannot fully heat up so you need to ready for at least three turns. But since they are expected for sniper duty it can be enough.
edit: Also add a mech with ultimate melee weapon;
Zodiac (Talon)
Mass: 35 tons
Chassis: Standard Biped
Power Plant: 140 XL
Cruising Speed: 43.2 kph
Maximum Speed: 54 kph
Jump Jets: Standard
Jump Capacity: 180 meters
Armor: Hardened
Armament:
1 ER Medium Laser
2 Improved Heavy Medium Laser
3 Flamer
Manufacturer: Unknown
Primary Factory: Unknown
Communication System: Unknown
Targeting & Tracking System: Unknown
Introduction Year: 3145
Tech Rating/Availability: F/X-X-X-F
Cost: 5,537,250 C-bills
Type: Zodiac
Technology Base: Mixed (Advanced)
Tonnage: 35
Battle Value: 1,350
Equipment Mass
Internal Structure 3.5
Engine 140 XL 2.5
Walking MP: 4
Running MP: 5
Jumping MP: 6
Double Heat Sink 10 [20] 0
Gyro 2
Cockpit 3
Armor Factor (Hardened) 80 10
Internal Armor
Structure Value
Head 3 9
Center Torso 11 12
Center Torso (rear) 3
R/L Torso 8 10
R/L Torso (rear) 2
R/L Arm 6 6
R/L Leg 8 10
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
Talons RL/LL 2/2 - 3.0
Jump Jet CT 1 - 0.5
Flamer CT 1 3 0.5
Targeting Computer RT 1 - 1.0
C3 Computer RT 1 - 1.0
3 Jump Jet RT 3 - 1.5
2 Flamer RT 2 3 1.0
3 Triple Strength Myomer RA/LA 3/3 - 0.0
2 Double Heat Sink LA 4 - 2.0
CASE II LT 1 - 0.5
2 Improved Heavy Medium Laser LT 4 7 2.0
Double Heat Sink LT 2 - 1.0
Partial Wing RT/LT 3/3 - 2.0
ER Medium Laser HD 1 5 1.0
3 Triple Strength Myomer RA/LA 3/3 - 0.0
2 Double Heat Sink RA 4 - 2.0
With TSM'd Talons it may cause 22 damage on a hit. It lose a bit of armor compared by standard version, though.