I don't know what KRL and KLL are, but I think I've figured it out. The M1 increases (one on each side, leaning in opposite directions) look pretty good, so I think I'll use those. To keep the diamonds from getting skewed, I'll do an increase at each end of the front needle, then (however many rows up I need) I'll do the same increases at each end of the back needle. That'll keep everything even and keep the diamonds nice and centered.
I'm doing the increases on the sides (as for the toes), because I don't want the diamonds to be bigger in the back than in the front.