  It is an interesting question whether a given infra-red duality between
quantum field theories can be explained in terms of other more elementary
dualities. For example recently it has been shown that mirror dualities can be
obtained by iterative applications of Seiberg-like dualities. In this paper we
continue this line of investigation focusing on theories with tensor matter. In
such cases one can apply the idea of deconfinement, which consists of trading
the tensor matter for extra gauge nodes by means of a suitable elementary
duality. This gives an auxiliary dual frame which can then be manipulated with
further dualizations, in an iterative procedure eventually yielding an
interesting dual description of the original theory. The sequential
deconfinement technique has avatars in different areas of mathematical physics,
such as the study of hypergeometric and elliptic hypergeometric integral
identities or of $2d$ free field correlators. We discuss various examples in
the context $4d$ $\mathcal{N}=1$ supersymmetric theories, which are related to
elliptic hypergeometric integrals. These include a new self-duality involving a
quiver theory which exhibits a non-trivial global symmetry enhancement to
$E_6$.
