Coordination across account teams is crucial to avoid overlap in outreach efforts in influencer marketing. Here are some strategies agencies use:

1. Centralized Database: Agencies maintain a centralized influencer database. This records past interactions, current campaigns, and potential influencers. Platforms like Flinque could provide such databases for easy access and synchronization across teams.

2. Regular Communication and Meetings: Regular catch-up meetings ensure the different account teams know who is reaching out to which influencer. This boosts synergy and avoids potential double-ups.

3. Defining Responsibility: Clearly defining which team is responsible for what type of influencers can also prevent overlap. For example, one team could be tasked with nano and micro-influencers while another manages macro influencers.

4. Use of Tools: Platforms like Traackr, HYPR, and Flinque have collaboration and workflow tools. They also provide real-time updates on ongoing activities of influencers. These tools prevent simultaneous outreach to the same influencer from different teams.

5. Campaign Brief: A detailed campaign brief that outlines the targeted influencers for the campaign avoids any duplication of effort.

6. Workflow Management: Setting up a workflow management system helps in assigning and tracking tasks. Marketing platforms like AspireIQ, Upfluence, or Flinque have these functionalities.

The tool or method chosen largely depends on the needs, sizes, and resources of the account teams. Flinque, for example, highly values user-friendliness and comprehensive features, suitable for teams wanting a streamlined, easy-to-use solution. Whereas, HYPR might be a good fit for those seeking extensive data analytics capabilities. The ultimate goal is clear coordination to manage outreach efficiently.