GTM Load Balancing

Either way will allow for the dynamic type, but as you indicated, you'd need to define the qos algorithm that strikes the right balance of connections/throughput/etc. It's really knowing your environment and working out the layers, if they're needed, to suit the resources. For example, if you have two datacenters and want to load balance connections between them, and then load balance within the datacenter, least connections at the wideIP level might not be a good idea if you have 10 servers in DC1 and 50 servers in DC2. But you would most likely want to do least connections within the datacenter, assuming each virtual server fronts an equivalent number for servers.