how or who do i talk to get an extra ten names to complete their Initiatory?
When you are reserving names for ordinances to be done in the temple, you can reserve as many as fit into the policies for reserving ordinances using the information within the link here including the related articles near the bottom of the linked article: https://www.familysearch.org/help/helpcenter/article/how-do-i-request-ordinances-for-an-ancestor-who-was-born-in-the-last-110-years
However, when in the temple, there are policies that need to be recognized and followed. Ordinance workers in your temple can surely tell you about the options for doing a specific number of ordinances per day. Doing more than fits the policy may decrease the time available to other patrons also wishing to perform the allowed ordinances on a specific day.
We are reminded of the phrase, "Obedience brings blessings. Strict obedience brings miracles."