Since when determination have been nerfed...
It only require more point like any other stat
The effect never changed...
But true fact the gain very low
And this is not so bad for a whm since its only ability is raw healing
If you want to reach full 100% hit rates you can the cap to aim is 600 not really hard with some meld
Piety is not stat that allow more chance of mistake... it's a stat that allow you to patch up your group mistake (slow-ass DPS...)