Thank you.
It's good to see some Dreamkeepers fans on here.
It's possible that some bug has come up between versions that is preventing Liz from spawning, though you should be able to have both of them at the same time if you have two empty rooms with an artist's desk in each. I'll do a little bit of testing to see what I can come up with.
I've thought of having some way to show armour over a Dreamkeeper, but haven't gotten around to it yet. I could do a similar thing with the halo. I guess a vanity item of some kind could do the trick. I should mention that the charm will work in a vanity accessory slot.
There currently isn't an upgrade to their powers yet, but I'm just starting to work on more powerful versions of the powers for hardmode. I'm dividing my time between this and a few other things at the moment, but I think it's about time I worked on it a bit more.
Thanks for your offer of help. Though I haven't really collaborated with anyone before, I'll be sure to keep you in mind if there's something I think you can help with.