Hi! Thanks for the thoughtful feedback on Nix. I'm actually working on unlocking her sigil myself today, it is the last one I need too. I've always thought of Nix as the "math turtle" since playing her always comes down to precise calculations.
The recent update had a couple of important changes that might help. Shield stacks are now immune to gravel damage, and toxin damage has been reduced from 20 to 5 as long as you have at least 1 shield stack active.
For Shimmera, its current minimum hardness is 13, but I agree it may be a bit too punishing. I'm considering lowering it to 12 to make it a bit more manageable for Nix.
As for Umbra, I usually craft Mageflare Runes in bulk and use one every 3-4 digs down. Their effect is halved in that layer, but they still make a noticeable difference when used consistently.
And I'm really glad you're enjoying the capsule machine. It always felt like a missed opportunity to stop using the relic minigame after 20 relics, so it is nice to finally bring it back :)
