You’ll need to go the hard way and experiment.
Last I heard, you can only cast only one Healing Springs at a time. Previously, you could stack them up to 4 at a time. Yet the tooltip does not have any information on this. This should be stated in the tooltips, including which stats they scale from.
Your best bet is to search the patch notes
Questions like this will need to be calculated out by yourself using the online interface here though numbers may be off by a small magnitude
What is my
- Physical/Spell Penetration?
- block cost?
- dodge cost?
- Cost of sprint?
- Healing done?
- Sneak Cost?
- etc..