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1. Do not to associate more then 50 queues to each agent. If you really need to overcome it, please consider very high processing consumption.
2. Remove the old queues you do not use anymore. This is very important: we often see customers adding new queues and associating it to the agents, without considering remove the queues not more in use. Remember that any kind of not used queues associated to an agent will also mean waste of processing resources!
3. Add carefully Carefully add new queues to the agents only when you really need it. Having an agent managing calls for 200 queues does not make a lot of sense, even in terms of contact center design management and monitor.
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