Regarding the crafted jewelry, it is definitely very good at the moment. Also very expensive.

A pentameld - assuming melded 3x vit IV, 1x random IV, 1x vit III - gets you 31 Str, 28 Vit, and 49 points of secondary stats. 59/49 of primary/secondary.

An i210 slaying gets you 47/74 of primary/secondary. I will GLADLY trade 25 secondary for 12 primary stats. (Unless the fights get easy, then full Str)

An i190 slaying (which OP probably has most of) gets you 40/61 of primary/secondary. 19 primary stats behind. Per piece. That's huge.

The argument against i150s is that they're expensive and have been out a while. SE could put out another set next week & make these obsolete. And at some point they probably will (These are grey. The i110s were green. Crafters need a "chase" item.)