How can I domino this 3-way joint?

[smorgasbord]

Stock is about 21mm thick (seen on edge above), and about 60mm wide. Obviously, I could join Pieces B and C to Piece A, but then Pieces B and C are not attached to each other, see dominos in red:



I was thinking about doing that last piece with parallel to each other, not perpendicular to the faces dominos:


I'd do the red domino first to join A to B, then bring C in with two parallel dominos. Seems iffy.

Any other ideas?

This is for a table base:


And table:


I'm not yet happy with the proportions. I'm trying to do a variation on a Mission table, except with hexagonal legs and hexagonal spindles, and a 3-part base instead of the standard 4-part. The top is 900mm in diameter and is 840mm above the floor (It's for an grand entry table under a big chandelier). So, it's a bit higher than normal dinner tables/desks.

 

[luvmytoolz]

I'd go with the second option myself, this will also give you a very strong joint with the increased glued surface area.

 

[smorgasbord]

Ugh, boss just nixed the 3-legged design. Back to the drawing board (app).

 

[Crazyraceguy]

Three-legged tables never wobble.
You may not need it, because of the override, but a connection like that first pic is possible. It depends on size, but a three-piece joint just needs to all slide together at once. Clamping is the biggest challenge. Band clamps or some kind of fixturing can do it.