  The requirement for the absence of spontaneous symmetry breaking in the d=1
dimension has been used to optimize the regulator dependence of functional
renormalization group equations in the framework of the sine-Gordon scalar
field theory. Results obtained by the optimization of this kind were compared
to those of the Litim-Pawlowski and the principle of minimal sensitivity
optimization scenarios. The optimal parameters of the compactly supported
smooth (CSS) regulator, which recovers all major types of regulators in
appropriate limits, have been determined beyond the local potential
approximation, and the Litim limit of the CSS was found to be the optimal
choice.
