serverside certifcate per server

It might be easier to throw it all into a data group. Example:

when SERVER_CONNECTED {
    if { [class match [LB::server addr] equals my_ssl_server_dg] } {
        SSL::profile [class match -value [LB::server addr] equals my_ssl_server_dg]
    }
}

where "my_ssl_server_dg" is an arbitrary string-based data group that maps the server IP to its corresponding server SSL profile. Like this:

10.70.0.1 := test1_serverssl
10.70.0.2 := test2_serverssl
10.70.0.3 := test3_serverssl

It doesn't alleviate having to create a separate server SSL profile for each server node, but it makes your code easier to manage. You also don't need the SSL::enable serverside command if you already have a generic server SSL profile applied to the VIP.