Jack Stormgrim
Wanted Pirate
LEVELING POTIONS GUIDE
You can do it at any island but is definitely better at Port Royal so you don't get ingredients you wont need (the ingredients other islands have).
Minutes of the video for each level:
00:16 Level 5-9
01:12 Level 10-14
02:07 Level 15-16
03:04 Level 17-20