  In this article, we study the asymptotics of harmonic functions. A typical
method is by proving monotonicity formulas of a version of rescaled Dirichlet
energy, and use it to study the renormalized solution -- the Almgren's blowup.
However, such monotonicity formulas require strong smoothness assumptions on
domains and operators. We are interested in the cases when monotonicity
formulas are not available, including variable coefficient equations with
unbounded lower order terms, Dirichlet problems on rough (non-$C^1$) domains,
and Robin problems with rough Robin potentials.
