Figure-of-merit, f, as a function of the number of COSEBIs, n_max, used. 7 free parameters listed in Table1, and 8 tomographic redshift bins are considered here. The solid line shows the result for using Log-COSEBIs with the true underlying cosmology. It also represents the maximum information level for a given n_max. The circles, stars and the Y-shaped symbols represent the f-values for First order, Second order, and their combination E^c, where n_max COSEBIs modes with the fiducial cosmological parameters are utilized in making them.