ATM I plan to renew SS and exchange DET with Crit. What I wonder is, I would like to add some points to SS. In order to do so, I start from scratch with zero because what I have read so far is that you can't just enhance a second stat but have to start all over in order to raise it. So I am thinking it is maybe better to collect Alexandrite and Materia for a week or two before I start with Novus upgrade. Otherwise, the 1st upgrade will be a huge downgrade. DET lost, a tad of Crit added and a lot of SS lost. Doesn't sound that appealing so I think I rather wait a bit and then make a few upgrades at once.