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For rims the stiffest is the Kinlin XR31T and there is an offset disc brake version now.
DT Swiss RR511 is stiff but not offset more expensive and require funny nipples and nipple washers.
Pacenti SL25 is a decent rim but not offset. Otherwise I can find nothing wrong with it.
Velocity Aileron is pricey but my set have been pretty good. I have killed two rear rims though one down some steps and one in a pot hole.
DT Swiss R460 DB is nice and cheap and so is the Kinlin XR22 RTS OCR (catchy name hey0 disc brake rim. this is offset same price as the DT R460 and nicer to build with (rounder and flatter).
The archetype though is indistructable available in 36H drilling but then you are limited to mostly shimano MTB hubs like the venerable XT M756. that would be a sturdy wheel just not a light one.
@thecycleclinic has built wheels with them, so he should be able to get you some rims. Bike24 don't have the 32H disc rims at the moment, but there's no reason why you couldn't use the standard version with disc hubs, unless you want to wait for aesthetic reasons.