  In a pure inverse seesaw framework, achieving a substantial lepton asymmetry
that can be converted into the observed baryon asymmetry of the Universe is
extremely challenging. The difficulty arises primarily due to two reasons, (i)
partial cancellation of the lepton asymmetries associated with the components
of a pseudo-Dirac pair, and (ii) strong wash out caused by the inverse decays.
In this work we offer two possible resolutions to overcome the above mentioned
challenges considering a (3,3) ISS framework. Our first proposal is based on
the assumption of a non-standard cosmological era in the pre-BBN epoch, that
triggers a faster expansion of the Universe, thereby reducing the washout by
several orders of magnitude. The second proposition is an alternative of first
which considers a quasi-degenerate mass spectrum for the singlet heavy
neutrinos, resulting into a larger order of lepton asymmetry that survives the
impact of strong washout to account for the observed BAU. The viable parameters
space, as obtained can be tested at present and future Lepton Flavour Violation
experiments {\it e.g.} MEG and MEG II.}
