Looked at your trophies and I see you have 100% Witcher 3. nice.
I didn't know about the meditation refilling potions since I did go and craft swallow. Do I just run and go buy water from the inn or are you saying you can drink water from lakes and stuff?
Buy water whenever you see it cheap. I think 5 gold or something is the norm. Maybe 10 gold. Or loot it. You'll run out if you use food to heal a lot. It's one of the better money to healing ratios, and is fairly available. There are some foods that are better, but it's hard to find more than a couple of.
I basically had swallow and water hot keyed most of the game. Swallow heals more, but is limited to how many you can carry between meditations. Water you can get a big stack of, but heals less.
P.S. Side note, I played the main campaign on PC first, so I actually just rushed through it for the platinum. So I knew what I was doing when I started on PS4 Death March, which is why I'm saying you just need to understand the mechanics, and then it's no longer that hard. And I was killing the expansion NPCs at an early level, which was what I was referring to. I had level 30+ weapons and armor by the time I was level 6 or 7.
Edit again... I actually almost beat Megatron in Transformers on my first try on hard. A pesky unexpected QTE threw me off. I actually have the video recorded and I've watched it through a couple of times and that QTE completely messed up my rhythm and it went from getting hit 0 times to flustered and dead cause of it. It was maddening and amusing at the same time. I had crap weapons, so it was like 10 minutes of not getting hit, so I was actually kinda proud of it.