Tbh, I think belts should always be INT based and there should be no other belt requirement types. (limits what a tank can use and gives classes with low STR a way to get resists/compete)
It makes sense after all, they are technology based field protection belts so it would take Intelligence to be able to use such a device.

I think there's issues with the currently available STR based armor, (more simplified tiers and resist types for each tier maybe?) and PSI armor probably does need looking at.