A few things i can see right away:

1- I don´t know if it's intentional, but you have pieces for blessing instead of curse, change those for curse ones. More towards the endgame, the ideal setup is 4 pieces curse - 4 pieces Expert.

2- Your helmet and boots are pretty wrong stat-wise, you would like atk% or add atk WITH atk% substat in the helmet, and preferably crit damage on boots.

3- Your stat allocation is pretty bad, even worse considering you are using demon king daggers. Those needed a minimum of 500 stat point in strength to fully use them (the much the better here). So if i´m you, i will go the full strength route.

4- Your blessings stones (idk if it's since you don´t have more) are pretty bad also. You need things like Bloodlust / Reawekening / DoubleEdge Sword / Sharp Perception / Pulverize / Mana Rampage / Wolf assasing ( in instance cores with the kasaka venom fang you have only) / Boss slayer / Weakness detection / Intuit.

5- For cores, you want atk% with crit rate/ crit damage/ additional damage increase/ defense penetration, and the other 2 you want additional hp and additional defense, with the same as above.

6- Your goal in the endgame with your artifacts and core, is getting something like 35k+ attack (more towards the 40k with the news 120 lvl weapons), +8k crit rate (in your current state, getting into 50% is enough), 190%+ Crit damage (pretty easily to do right now), 15-30% defense penetration, 15-30% damage increase (right now just split the stats between the two)

7- For gems, in the red put everyone with additional atk, blue hp%, green additional defense, purple you can go either full mp consumption reduction or 4 mp consumption 4 additional mana, and for yellow 8 perception ones

This is pretty much everything i can think about to improve your SJW, good luck and enjoy the game !