1. The rule of thumb is if you are trying to kill something use kill. Otherwise use heal. So with anxiety I would use healing preset.
2. If it doesn't belong in the body - like a pathogen - use killing preset. Otherwise, use Heal. If unsure, use Heal.
3. If you want to run anxiety program remotely, yes you need to choose shell empty preset and then choose remote mode. For anxiety, we recommend you to choose healing.
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