  We discuss results for the Roberge Weiss (RW) phase transition at nonzero
imaginary baryon and isospin chemical potentials, in the plane of temperature
and quark masses. Our study focuses on the light tricritical endpoint which has
already been used as a starting point for extrapolations aiming at the chiral
limit at vanishing chemical potentials. In particular, we are interested in
determining how imaginary isospin chemical potential shifts the tricritical
mass with respect to earlier studies at zero imaginary isospin chemical
potential. A positive shift might allow one to perform the chiral
extrapolations from larger quark mass values, therefore making them less
computationally expensive. We also present results for the dynamics of Polyakov
loop clusters across the RW phase transition.
