Opifex have a real lack of armour for their back slots.

ICC cloaks only go up to lvl100.
Red combat suits are MA only
Notum spangled, and intern-op cloaks are omni only


That leaves only Avangeline Terrigena Web Cloaks for all the other opi's. And they aren't even dropping too often. (and are invisible, I don't want to see my dillon armour please)