Load balance 1WAN + 2LAN

I have something like :

and i want to configure PC-MT1 to balance traffic between RB-MT1 and RB-MT2.
This situation is in opposite direction to situation in manual about load balance. I want to split traffic in half for each RB (RB-MT1 and RB-MT2).
How to configure PC-MT1 ??

Maybe try to use bonding on MT1
http://wiki.mikrotik.com/wiki/Bonding_Examples

Regards
Marcin

ECMP should work great, as long as you don’t have any src-nat on those two links.

RB-MT1-4 are only for wireless bridge. There are no client, no src-nat only routing.

simply mangle your src addresses and apply those in queue list