I've heard that there are some complaints that you can't wear robes over
armour. This is intentional. Greatrobes offer armour-like protection and
is not meant to be 'stacked' with armour. You either wear greatrobes
-or- armour, never both. This is why tailoring is specifically not
recommended for warriors.

However, regarding proofing against fire and cold, tailors can fireproof
or coldproof coats which -can- be worn over armour (cloaks are included
in this category) so there is definitely beneficial items for those
wearing armour to purchase from tailors.

Penned by my hand on the 24th of Dvarsh, in the year 101 CE.