Assume we have an IVP $y'(t) = f(t,y)$, and that $\partial_t f$ and $\nabla f$ are cheap to compute.
Assume further that more derivatives are not cheap to compute, or inaccessible for some reason, perhaps API related.
What are the best ODE steppers for this case?
Taylor series methods are available with $O(h^3)$ error, but presumably assuming more smoothness we can do better.