Pull .csv Alerts Thresholds Report via API

I have had to do this with 20k+ devices. The way I achieved it was much slower but seemed to be more stable. I iterated over each device's datasources and then instances and then thresholds. I would chunk it to groups of 1000, save each of those chunks to their own files and then if the script failed, or timed out, I could restart at that given chunk.