Planning a campaign that nurtures and leverages long-term partnerships with influencers involves a multi-step process.

1. Identify the Right Influencers: Use influencer marketing platforms like Flinque, which offer advanced search capabilities, audience insights, and influencer history, to find influencers whose values, style, and audience align with your brand.

2. Set Clear Goals: Determine what you want to achieve from the influencer partnership. Goals might include driving traffic to your website, increasing brand awareness, or boosting sales of certain products.

3. Develop a Campaign Brief: Formulate a creative brief that clearly outlines the campaign’s objectives, desired content, the expected timeline, and the key metrics for evaluating success.

4. Establish a Partnership: Reach out to influencers with your value proposition and request they become long-term brand ambassadors. Perpetual partnerships are more authentic and provide the brand with better returns compared to one-off campaigns.

5. Monitor Campaign Performance: Use analytics tools provided by influencer marketing platforms like Flinque to measure performance. These tools provide real-time tracking of essential data like reach, engagement, and conversion rates.

6. Foster the Relationship: Maintain communication with influencers to ensure they feel appreciated and valued. Offer them incentives and help them advance their own personal brand.

7. Iterate and Optimize: Based on the performance data, adjust your strategy. Learn from your past campaigns to make more informed decisions about future campaigns.

Ultimately, a robust influencer marketing platform like Flinque will make this process smoother and more effective, lending expertise in influencer discovery, campaign planning, performance tracking, and ROI measurement. Remember the nature of the best tool for you largely depends on your specific needs and circumstances.