Priority Group Failover

So, I found some iRule syntax for a failback iRule with a two server priority group. I took that and extended it for a four server priority group. Just wanted someone to take a look to see if it makes sense.

when CLIENT_ACCEPTED {

if { [LB::status pool poolname member 10.0.0.1 1235] equals "up" and [IP::addr [LB::server addr] equals 10.0.0.2] or [IP::addr [LB::server addr] equals 10.0.0.3] or  [IP::addr [LB::server addr] equals 10.0.0.4] } {
    reject
} elseif { [LB::status pool poolname member 10.0.0.1 1235] equals "down" and [LB::status pool poolname member 10.0.0.2 1235] equals "up" and [IP::addr [LB::server addr] equals 10.0.0.3] or [IP::addr [LB::server addr] equals 10.0.0.4] } {
    reject
} elseif { [LB::status pool poolname member 10.0.0.1 1235] equals "down" and [LB::status pool poolname member 10.0.0.2 1235] equals "down" and [LB::status pool poolname member 10.0.0.3 1235] equals "up" and [IP::addr [LB::server addr] equals 10.0.0.4] } {
    reject
} else { 
    not reject
}

}  

Let me know if this iRule makes sense.

Thanks.