Two-point functions are a central property of many field theories, including holographic cosmology which is the subject of this collaboration's research. Often analytical expressions of two-point functions are not possible in the case of non-renormalizable theories and theories with non-analytical amplitudes. Here lattice methods must be used, however, to achieve the best estimate for long-range correlators one has to overcome the signal-to-noise problem: a key issue in the field of Lattice QFT. One modern method used to combat this multilevel, and it is the aim of this talk to explore the effectiveness of this technique in different situations.