no, Golduck does NOT work well... that belongs in its own deck. Only Magnezone and your starter should ever be active.
I think there's not enough room for Bronzong, what with all the energy. Running 3-2-3 Magnezone and Feraligatr, 1 Azelf, 4 Smeargle, and 1 Unown Q gets you to 22 Pokémon already. Adding in the energy you need (20 or more, I've found about 21 or 22 works best) gives you enough room for 18 T/S/S, which is really low.
This deck already has enough drawpower to get basically any card you want on your turn, once set up.
If you did put in the Bronzong, you'd probably have to take out IQ, which would be pretty interesting.