Currently, if you log off (or crash, as I usually do), you lose attunement to the relic. That makes it quite expensive to retain your spells, forcing you to seek rest much more than you usually would with other classes. Therefore, I suggest to remove the limit of attunements you may make with relics or, at least, that you don't lose attunement after you log off.
That being said, I thank you guys a lot, the Relic System is amazing and it brought me back!
It's actually a bug that the attunement doesn't stick between logging, which I'll fix sometime later this week.
The Attunement per Day won't go away because it will just have players attuning and using every relic they can and have which isn't really what this kit is about.
Should be OK from next reset. If not I'll think of something else I guess =\