I don't see it. We see Kidd prepare the cage and then tell Law "it's ready":
The idea that one person came up with the plan is further supported by Killer and Zoro's scene. Killer asks Zoro if he's able to perform his role:
It really seems that one person (Law) came up with the plan to split Mama and assigned everyone the roles they would need to fulfill that plan and how best to utilise their abilities.
There is no indication that Kidd was involved in coming up with the stratagem at all:
- Zoro was questioning how they could possibly win:
- They began thinking of a plan to bring victory into the realm of possibility:
- Law is the one that suggests that they should split them up:
- Zoro and Kidd consent:
- Kidd's sole tactical contribution was the suggestion that Law should just use his powers to transport one of them away:
- Killer is also the strategist of his crew, so coming up with the plan in the first place does not fit Kidd's character.
I don't think your interpretation is the slightest bit possible.
I did not deny that Kidd assisted Law. However, Law was the one that:
- Identified the need to separate them
- (To the best of our knowledge) came up with the plan to best leverage their abilities and separate them
And even then, all that Kidd did was to assist Law (he setup Mama for Law to throw her off the Rooftop). He had the second most import role of the four, but it was not equal to Law's