Full-res shots from this page.

Just because I thought it would be funny if Rainbow couldn’t hit anything without Pinkie’s help doesn’t mean I didn’t want her to be able to meaningfully contribute, so I had her be the solution to the problem that Applejack was going to have of ‘Isabela’s’ AC being just one point too high. ‘Course, that ended up not being a problem in the final cut, but a +2 bonus is always welcome.

The last shot was originally Pinkie using a power to move her allies into a favorable position, but apparently she takes too many actions out-of-turn (which the real Pinkie Pie wouldn’t have problem with, but D&D has to have the illusion of fairness).