What strategies can I adopt to balance an influencers’ relevance and reach while shortlisting for a campaign?

I am interested in influencers who have proven effective in past campaigns. Can I shortlist by this criterion?

Can I shortlist influencers who have a clean track record when it comes to compliance with advertising standards and norms?

What steps can I take during my shortlisting process to ensure I’m selecting genuine influencers and not those with fake followers or engagement?

For a multi-platform campaign, can I shortlist influencers who have a strong presence on more than one social media site?

I want to find influencers who frequently use certain hashtags. Can I shortlist influencers based on hashtags related to my campaign or brand?

How important is the relevance of the influencer to my brand when I am putting together my shortlist?