  Prospects of experimental studies of argon and chlorine isotopes located far
beyond the proton dripline are studied by using systematics and cluster models.
The deviations from the widespread systematics observed in $^{28,29}$Cl and
$^{29,30}$Ar have been theoretically substantiated, and analogous deviations
predicted for the lighter chlorine and argon isotopes. The limits of nuclear
structure existence are predicted for Ar and Cl isotopic chains, with $^{26}$Ar
and $^{25}$Cl found to be the lightest sufficiently long-living nuclear
systems. By simultaneous measurements of protons and $\gamma$-rays following
decays of such systems as well as their $\beta$-delayed emission, an
interesting synergy effect may be achieved, which is demonstrated by the
example of $^{30}$Cl and $^{31}$Ar ground state studies. Such synergy effect
may be provided by the new EXPERT setup (EXotic Particle Emission and
Radioactivity by Tracking), being operated inside the fragment separator and
spectrometer facility at GSI, Darmstadt.
