I got a really sweet deal on a Chris King tandem specific 36h rear hub. I now have to decide how to build the wheel up. I have a few ideas myself but I want to see what you folks might suggest.

Here are the gorey details...

Team weight 390 pounds plus the weight of our Comotion Speedster.
We are gear mashers - average cadence 80 - 85 rpm on the flats
98% of our riding is in Northwest Florida and lower Alabama so we don't have any real hills and definitely no mountains with which to contend.
We use the bike for local club rides, centuries and charity events. Loaded touring is not on our agenda.

Thanks for your help.

We are a bit lighter than your team (just under 250 lbs) and use Chris King hubs. 32H front, 36H rear. Revolution db spkes and Velocity Aerohead rims. So far have 17,000+ miles on them with one broken alloy nipple on front wheel @ 17,000 miles.
Would suggest a bit beefier Velocity rim for your team weight and heftier non-alloy nipples.
Just our opinion.
Pedal on TWOgether!
Rudy and Kay/zonatandem

I plan on copying what a friend of mine built. 36 spoke CK hubs, Mavic CXP-33 with 14g Wheelsmith with brass nipples. We are 50 lbs lighter so I don't know how that would hold up for you.You might want a beefier rim.

I would need to know what size tires you plan on running to make a specific recommendation. In general, the CK hub will limit you to 3x lacing as I'm pretty sure you'd end up with spoke head overlap at the hub if you went to 4x.

If you're running nothing smaller than a 28mm tire, then the Velocity Dyad would be a good choice for a rim. Fairly light, but nice and wide with a penthouse profile that makes it a bit more robust than a box or semi-aero rim. Colors are limited to silver or black.

If you run nothing larger than 28mm, then you could get away with using a Velocity Deep-V. The Deep-V will make for a very strong wheel that has a pretty nice look to it on a tandem, but it's a bit heavier than the Dyad... by about 80 grams. On the plus side, they come in a rainbow of colors... I'm partial to the Ti Gray for polished hubs.

Spokes... I'm predisposed to prefer double butted (14/15) for tandems & brass nipples. They just seem to make for more reliable wheels / less spoke breakage even when subjected to things like stokers who bounce.

If you're running nothing smaller than a 28mm tire, then the Velocity Dyad would be a good choice for a rim. Fairly light, but nice and wide with a penthouse profile that makes it a bit more robust than a box or semi-aero rim. Colors are limited to silver or black.

I rebuilt my tandem wheels last spring using Dyad rims. I was over-the-moon on how they came out. After tensioning the front took only minor side-to-side trueing. The rear took no trueing at all. I'm dying to build another Dyad wheelset to see if I can replicate that outcome.

I've tried responding twice and failed maybe the third time is the charm.

Thanks for all the input. I was thinking of using the Deep-V's myself and maybe matching the bike. Given our team weight I'm not much of a weight weenie. I'm more concerned about having a wheel that will hold up to the stress we put on it. We've climbed smaller bridges at 25-30 mph and hit downhill assisted 50 mph+. That's not a big number for folks with real hills but we don't have anything over 1/4 mile in our area so most of the speed is from us. In fact our timing chain was a little loose and the last time sprinted it popped off the rings. It was rather interesting. When our DT Swiss Hub failed it was grinding up a hill at 65 rpm. That wasn't real fun.