>>536022083
if you find 4* blue with 1 line you want, you can alter the other and then generally get a decent bonus on leveling it further, add refine for an extra 4-6
>>536022538
alter - changes stat, do before you upgrade a piece
refine - adds to stat, do after upgrade (it might be fine to do before now, and I think there were notes about that but I still do it this way either way just in case)
this piece is decent example,
wouldnt upgrade it to 20 though since it will most likely roll div/res and the alter has already been used
imo only rank armor when you know or control the stats,
weapons will always have more atk or mag at the least