Basically we are limited to 8 units for deployment. However, I recall some missions allowing 9. Are these just the last/final missions?
Then there is the Phoenix Point FAQ that implies the maximum squad size can be up to 16:
- When you said 4+ squads, that means the starting lineup is 4?
Four is the lower limit for deploying a squad, not a starting limit. Squad Sizes can be as high as 16, depending on the transport available and the type of mission. A more limiting factor on squad size would be the scarcity of recruits and ongoing injuries (or mental traumas) of soldiers.