Indexing tools aren't magic, so match them to your scale. For high-volume link...

https://wiki-nest.win/index.php/Is_it_safe_to_index_10,000_URLs_at_once_or_should_I_pace_it_out%3F

Indexing tools aren't magic, so match them to your scale. For high-volume link building, look for API-based services that push requests in under two minutes