It's difficult to extrpolate without knowing the system mechanics but as long as you're not involved in totally asymetric encounters (swarms of unarmoured natives/zombies/animals/redcoats/redshirts) versus dragons, gods, Gundam-suits etc, then you can wing it, can't you?
As a suggestion:
Each side gets to pick 4 basic troopers, one specialist (has a specialist weapon OR a combat skill) and one leader (has a specialist weapon/combat skill, and a bonus to leadership statistic).
Up to 6 further troopers are available, as are the following upgrades:
Upgrade the armour in the patrol from 'none' to 'light'. This decreases the number of further troopers available by 2.
Upgrade the armour in the patrol from 'none' to 'heavy'. This decreases the number of further troopers available by 4.
Upgrade one trooper to another specialist (has a specialist weapon OR a combat skill). This decreases the number of further troopers available by 2 (including the new specialist). This may be applied multiple times to different figures.
Each patrol must include at least 4 basic troopers, a specialist and a leader.
So a patrol ranges from 10 regular troopers, one specialist and a leader, to four basic troopers, 2 specialists (one original, one 'bought') and a leader, all with heavy armour. Other possible combinations include 8 basic troopers, a specialist and a leader, with light armour; 4 basic troopers, 4 specialists and a leader, with no armour; 6 basic troopers, a specialist and a leader with heavy armour etc.
Does that make sense? It's not exactly 'point balancing' but it might go some way to establishing equivalence for different upgrades. It's quite rough and ready but without playtesting it can't be more accurate I don't think (I don't even know if your troops can take armour, for instance).
EDIT: perhaps a simpler way to explain it is this:
Requisition Points:
Each Patrol starts with 4 troopers, 1 specialist and 1 leader; all Patrols must include these figures.
Upgrades:
Troopers = 1RP each
Specialist = 2RP
Light Armour for Patrol = 2RP
Heavy Armour for Patrol = 4RP
Each player has 6RP to spend on upgrades.
Looking at it this way implies that the Patrol could theoretically take something that costs 6RP - perhaps a vehicle or combat-robot or something? - if they didn't take any other upgrades.