As far as SCH Regen V goes, it can vary depending on gear, augments, and if they have Light Arts up.
Base is 40/tic
With Light Arts up, it's 64/tic
***Tabula Rasa adds +12/tic***
Bolelbunga adds 10%
Savant Bonnet +2 adds either +5/tic, or 10%/tic. Testing was done, and shows it to be 10%, but BGWiki still lists +5, so I am including both numbers.
Arbatel Bonnet adds +10 (probably +10%, since Savant +2 testing showed +10%, and most Emp 109 gear only included the stat vomit, with giving no actual increase to the JA enhancements)
Arbatel Bonnet +1 adds +15 (again, probably +15%)
Bookworms Cape gets a flat +1~10/tic.
So, with Light Arts up and Cape, Club, and 119 Emp head used, and assuming the testing is correct, that it is +x% for the Emp Head bonuses:
(64+10)*1.25 = 92.5, so +92
If this is wrong, I'm sorry. Not at my PC to run actual tests.
As far as I know, that is all of the armor that gives Regen Potency +. There may be some newer augments I haven't seen yet. If so, I apologize.