I am writing a manuscript in which I have tons of expressions looking like
q_{\iota(i),\mu_{\ind_{\mu}(\iota(i))}+1}\cdots q_{\iota(i),\mu_{m(a)}}x_i.
which rendered looks like

Sadly, they are mostly unreadable! If I could have subscripts go lower, so that their hierarchy were more evident, I think things would be less bad...
Can this be done (locally, ideally)?

\iota(i)is just unfortunate for readability. You force the eyes for the dot hunting. – percusse Jan 30 '13 at 23:01