VIP under VIP configuration using nexthop

OK, so, let's add some logging and see if it matches the keys in your data group. Also, how are you testing/confirming things? Is the nexthop subnet directly connected to the F5? Have you tried specifying the VLAN with the nexthop command?

ltm rule ssotestrule {
    when LB_SELECTED {
        if { [ matchclass [LB::server addr] equals ssotestrule ] } {
            log local0. "Destination Pool Member Is: [LB::server addr]"
            nexthop 192.168.200.193
        }
    }
}