I have little experience with actual bonding, but keep all my rabbits in pairs and groups when there are growouts, but they grow into their position so almost no bonding required. Exception is my buck and his spayed cuddlebun, but that was easy, just put them together - they are free roam house bunnies with access to the front yard.
So this is just my opinion based on what I see there.
Male-male bonds are rather difficult anyway, having one that works can't be taken for granted. I need to keep an eye on my bucklings as they grow up, but well, puberty, intact...
If you introduce a doe to this pair, that could get interesting. Unless they were neutered before puberty - which is quite common over here but seemingly unheard of in the US - they still have male brains, and the notion that they need to drive rivals away like most intact bucks would could be triggered by introducing a doe. Nothing is impossible, but I would be genuinely surprised if it would work.
I'm not too happy with trios, duos work well for me, and when there are more than 3 or 4 rabbits in my experience it gets easier again.
I don't see any of mine being scent orientated, sure, some marking when they get into the space a different group was in just before, it's more that they get to accept an area as common ground, but they can be very territorial in their hutches, which is a good thing if they have enough space. Like, this year I had a 5 week old litter when the other doe had hers, I added another hutch with nestbox to the complex and that was her territory as the 5wo quickly learned. The other two hutches still were commen groung with the growouts and the two other does.
I often read blanket statements about such issues, but the matter is imo more differenciated, it's always "it depends", and for me pretty much impossible to give sound advice on such issues, other than pointing out things that quite likely will cause problems.
