I don't think crystal HP and Mana stars stack up with the Leveled HP
mine kinda didn't I went from 300 (got a few crystal hearts pre-leveled mod installed) to 100+ when I newly installed the mod. so yeah; I don't think they stack
We started the map with Leveled installed, and my HP was raised by 20 when I used a crystal. I think if you install the mod and play with an existing character, the HP (and probably MP too) get reset.
Is there any way to get rid of the crystals, I just want to raise my HPs by leveling up... problem is I'm playing withmy 6 year-old son, and he can't resist using the damn crystals