I think you might save yourself a bit of work if you just make the goblin battle easier or just straight have the narrator tell the player it's okay if they lose the goblin skirmish because our friends have our back or something like that. I had no issues when my crew was farming mobs between the goblin battle and thalor's return and I tried both the hard and the balanced approaches. It's just the goblin battle that feels exceptionally tough for new players.
I love the melody that often shows up when Nimeria is involved btw, e.g. in the scene where the MC has "A moment alone with Nimeria". Normally I just mute or greatly reduce the audio volume in HTML games, but this melody is charming and fits the whole setting very well. You made it with AI tools, right? It's not taken from some other source?