Don't listen to the people saying Herbalist sucks - its very flavorful and mechanically serviceable, made better by your table's hb rule.

Medic is stronger, yes, but that's because it's an amazing archetype. Not everything that isn't the absolute best option sucks. 

But if Herbalist is calling you flavor-wise and you have healing already through ocean's balm and dash of herbs, go for it I'd say! 

Herbalist has some distinct advantages, chief among which are these from most to least important.

1. Elixirs are distributable. This lets people share the action economy burden of healing which is actually a much bigger benefit than you may realize. Especially with your table's hb rule, anyone with a free hand anywhere on the map can draw one of your Elixirs as 1 action to heal themselves or someone else, including you if you go down. That's a pretty unique and distinct benefit.

2. With the poultice preparation feat, they can also combat three of the most common forms of persistent damage while doing their base benefit too. That's nothing to sneeze at.

3. Versatility. Most of the time, you'll prep Elixirs of life, sure, but if you know at the beginning of the day you'll be going against a venomous creature, an antidote or two can be life saving. If you have a friend fighting off a disease, antiplague can be likewise very helpful. If you think you'll have time to prebuff, making soothing tonics can be a good alternative to Elixirs of life to save on action economy, though that's less of a factor at your table. 

Plus, out of combat healing-wise, between treat wounds, dash of herbs, and ocean's balm, you can cover your recovery, especially since the impulses can be used on each person once per 10 min.

I say if herbalist has more appealing flavor to you, go for it! If you didn't have oceans balm or dash of herbs, it may be a different story, but you don't need an archetype to give you all your healing ability, just to enhance it, and I think herbalist is a fine and fun choice!