Account niche: [niche]
Target audience: [audience]

Task: create a hashtag strategy for this Instagram account, split into 3 tiers:
1. 5 mega hashtags (1M+ posts)
2. 10 mid-tier hashtags (100K–500K posts)
3. 10 hashtags specific to the niche (under 50K posts)

Then tell me what each tier contributes to reach and to discoverability.