We calculate two indicators for neoclassical and anomalous transport in the low collisional regime, effective helical ripple εeff and zonal flow response , in an L = 2 heliotron with various shapes of the outermost flux surface. The εeff has a minimum as a function of a parameter representing plasma column twisting, δb. The time average of the damped zonal flow, , shows a similar dependence on δb. We can thus find the optimum configuration for both these indicators in an arbitrary L = 2 heliotron, by choosing the optimum value of δb, together with inherent toroidicity and main helicity of the outermost flux surface. The existence of the optimum is due to the most effective cancellation of the radial drifts of the particles trapped in each helical ripple, rather than the magnetic field symmetry in a whole surface.