Add Bond or Ports to Bridge?

I have a Bond (bond1) that has ports eth1 and eth2 as slaves.
I have a Bridge (bridge1).

bond1 on Router1 connects to bond1 on Router2 to serve as a VLAN trunk between the two devices.

When adding ports to the bridge should I:
add bond1
add eth1 and eth2
add eth1, eth2, and bond1

Any opinions on 802.1d vs rr for the bond between switches if I am purely going for performance?

Thanks!

Only add bond1 to the bridge.

balance-rr doesn’t boost throughput, and may cause headache to some TCP stacks. You may or may not be able to make use of the aggregate bandwidth depending on the traffic pattern.

I use bonding-rr since 3 years now and works very well!