The only refill stations I found are near a boss fight. I am on latest high lvl side quests. It wasnt a problem before but lately it has become quite a hassle.
Havent tried the regeneration potions though. Good thought. Need to upgrade them first though. In any case I dont like this system, it could have been much better and without hindering gameplay balance.
I personally don't find the need for healing spells, and I like the system because it makes me focus on preventing damage instead of healing it, which is to say it makes me plan out battles. But yeah if like you said you don't enjoy the tactical aspect it can be a chore. Besides the regen potions mentioned there's also a Healing Mist AOE heal grenade, and Knight Enchanter's focus move of course heals the entire party.