I have not actually tried to use my Holy Water yet so here is a list of questions:

1. Do you need level 4 extract, or combine?
2. Do you need 1 of those temporary stat boosting potions?
3. If you do, does the size matter?
4. Do you need alchemy plants?
5. If you do, does anyone have a formula list for the different potions?
6. How many stat points does it give?
7. Is it worth respawning battlefield merchants to just try and buy tons of Holy Water?

Thanks for any help.