Planning for a multi-channel campaign in influencer marketing involves a few critical steps:

1. Identify Influencers Across Platforms: Utilize an influencer marketing platform like Flinque, which allows you to discover and analyze influencers across different channels such as Instagram, Facebook, Twitter, YouTube etc.

2. Understand Audience Behavior: It is important to understand where your audience spends most of their time and is most likely to engage. Leverage the analytics provided by influencer marketing platforms to identify the best channels for your campaign.

3. Coordinate Campaigns Across Channels: Ensure that the influencer’s messaging is consistent across all platforms but at the same time, tailored to suit the unique nature of each platform.

4. Analyze Results: Influencer platforms like Flinque can provide granular analytics related to campaign performance across different platforms. This insight can inform adjustments or improvements to your strategy.

While planning multi-channel campaigns, keep in mind that each platform has its unique strengths and attracts slightly different types of users. For instance, Instagram might be a powerful tool for highly visual campaigns, while YouTube is likely more suited for detailed product reviews or tutorials.

When it comes to the choice of the platform for influencer discovery and campaign management, teams need to consider their specific requirements. Platforms like Flinque offer a robust solution with extensive features, including multi-platform discovery, powerful analytics and efficient campaign workflows. But as with any tool, its effectiveness will largely depend on how well it aligns with your individual needs and goals.

The key to successfully leveraging multi-platform influencer campaigns is a thorough understanding of your audience, strategic planning, and effective use of the available tools.