>>96771883
Like... maybe... hmmm... I could imagine something like this:

When the Rangers are piloting the combined Megazord, you average all their skills. Average everyone's Offense to get one value, average everyone's Defense to get one value, etc. And thennnnn add some modifier, like...

Mmmmmaybe each member of the team adds +1 to the average? So a 5-Ranger crew would add +5 to all those averages? No wait, that's too powerful, you need diminishing returns. And you can't count the first Ranger. So perhaps every doubling of Rangers adds one to the averaged Skill:

1 Ranger = normal skills
2 Rangers = averaged skills, +1
3-4 Rangers = averaged skills, +2
5–8 Rangers = averaged skills, +3

Something like that, maybe. So if you've got less than the full crew complement, you'll have less of a bonus to offset the averaging?

I dunno. Just turning this over in my head.