First few loops are 5 minutes, to check for first effects and recon levels.
If everything fine, then I try full loops and see how much recon / results are happening.
Going from 5 minutes up to full loops usually happens pretty fast with standard titles.
- For Artisan / Black Label / Recon-Heavy titles:
Starting with 3 minute loops (learned this lesson when WB was first released).
Then see how much recon happens.
After several weeks trying out 5 minutes.
Then 7.5 minutes.
After many months finally getting to full loops.
If strong recon, then always adding extra rest days.
Going from 3 minutes up to full loops can take up to 1 year.
Exception: with WB I had to even go back from full loops back to 3 minutes or even original WANTED and build up stronger foundation (doing so with Love Bomb at the moment).