  The recently introduced unbiased exponential resummation at finite chemical
potential has become an important approach which promises to capture reliably
the behaviour of higher order conserved charge cumulants appearing otherwise in
the finite-density QCD Taylor series of thermodynamic observables. In this
paper, we present a thorough analysis of the estimates of charge cumulants upto
eighth order and have compared them using Taylor expansion method and unbiased
exponential resummation approach for baryon and isospin chemical potentials. We
also subsequently compare the different estimates of the radius of convergence
obtained using these two methods and check if the zeros of phasefactor for
baryochemical potential can indicate something about these estimated values. We
propose a new method of finding a non-trivial phasefactor for isospin chemical
potential and we attempt explaining the different estimates of radius of
convergence from the zeroes of this newly constructed gauge-ensemble average
phasefactor for isospin chemical potential. Lastly, we also illustrate kurtosis
plots describing the behaviour of overlap problem in isospin chemical potential
and check if it maintains consistency with the appearance of zeros of the newly
proposed phasefactor.
