Talk:Arcane Enhancement/@comment-68.189.84.62-20150519063903/@comment-1686069-20150522003055

You have to do each stage in turn. So if you have three of them, you can use one to get Rank 0 and then use the other two to get Rank 1.

So yes at a later point you can use 7 more to get to max rank by using three and then four. You would still have to pay the 200k credits and wait the build time twice more.