WordPress MU

I intend to install wpmu on a cluster(2 apache severs) with load-balancer.
This cluster communicates with one seperate MySql machine.
Each of the wpmu servers in the cluster is a replicate of each other and has the wp-cron running.
However, I would like to avoid executing the wp-cron twice (one on each wpmu server) since it's useless and may damage some plugin functioning which I have.
Moreover, I don't want to disable the wp-cron in one of the wpmu servers since I want that future deployments will be as smooth as possible and I also would like to preserve the servers redundancy.
Any tips of how can I implement this?