You can grab our chaindata.zip anytime from our Gitlab, it is updated roughly every 6 hours or so. Staking by default is set to enabled. If you want to disable staking you want to add staking=0 to your denarius.conf
Direct Link: https://gitlab.com/denarius/chaindata/raw/master/chaindata.zip
Not sure if this is a real issue or not, but I read you had to hack some config file in Mac OS to enable staking. If true, fix that. Staking should be automatic. Also, if there is anyway to compress some of the blockchain this will help speed up the install on new nodes. Overall, I love this coin!
you can mix and match I try to keep them similar as far as just being NVidia or AMD
for Denarius Nvidia is far superior for the algorithm. As long as your motherboard has enough PCI-16x slots you can add a 1080ti no problem. Also want to make sure you have enough power when adding on, as well as space if it is in a case.