🎀 Wisteria 🎀

Hero/Dragon Constellation

I would personally choose the hero. +20% resistance to all elemental and higher-level damage is better than +30% to fire alone, and you already have enough physical resistance. +30% health, with 10 stamina, is roughly equivalent to three stamina points (although it's better with higher characteristic values). The fire effectiveness doesn't give you anything at all. And a 15% chance to ignore received damage, in my opinion, is less useful for someone with your huge dodge modifier than additional characteristic points.

Narcissus/Hydra/Wolf Constellation

The Wolf is good, but you already have a huge dodge parameter without it. It seems to me that this will be a drop in the ocean. The situation with the Hydra is similar, in that the bonuses are good, but only accuracy and resilience will be useful to you specifically. The Narcissus, on the other hand, will give you more HP than any of these constellations, and a fairly rare bonus to damage. I would choose it.

Added 1 minute ago

You also need to think about what skills to develop, because it seems like I can't upgrade weapons and armor anymore, now that the branch is open, and various hidden skills and Battle Points don't seem very useful either...

Battle Points are very useful. You also need to unlock a specialization for Offensive Spells. And the Mercenary should give you some good bonuses.