Siddharth, you can use the following channels:
1) **Agencies** - They usually request 8.33% of the fee, but you can negotiate it down to 6% for high volume.
2) **Job Postings** - Create a well-written job posting to attract candidates. Utilizing platforms like Monster can facilitate a 'walk-in' method for potential applicants.
3) **Ads in Newspapers, Flyers, Brochures, or Leaflets** - For 200 positions, the roles are likely entry-level and low-skilled. Utilizing flyers, brochures, or leaflets can aid in reaching out to suitable candidates.