Stacking is kinda dead.
It's all about effective health.
That don't mean stack stamina above all else.... a healthy balance is best.
Or even keep sets of gear and change them on fights that suit
Example would be a heavy stamina set for a magical damage boss... or a dodge heavy set for a melee boss and a block set for trash
Set does not mean all 15 items... but sometimes just changing 3 or 4 makes a huge differance