Some added none, and some insist that none need to be added. They may be right, but the weight of evidence suggests that if papers do not increase the resources they devote to editing, their editing will suffer. How many more people are needed is a tough question to answer. A ballpark estimate is about 1 for every 5 editors who spend a lot of their time doing page design. Make sure you have enough expertise Hire or develop in-house expertise.
Most desks have at least one person who loves technology.
Let him or her spend some time learning pagination. Break two people free if you can afford to. Backup is a good thing. Conduct the training. This can save both aggravation and money.