[Chaos]

You are putting VERY powerful effects on a lot of low-rarity accessories. You would be best off putting these kinds of effects on high-rarity accessories. Perhaps some that require to be made via recipe, with the screencapped accessory as one of their several components.

As for the items that aren't too common for what you're suggesting:
-If Ring of Thorns gets a +10% to all damage dealt, its Max. HP reduction should be 25%. There is no way you're going to see a 10% Maximum HP reduction balance out a +10% Damage Increase across the board.

-A Vampiric effect on Blood Whistle would be nice, but I would not let people get a 'Heal off of Wind damage dealt' effect. Nor would I put an effect that boosts a stat's soft cap on anything less than 8~10* items. A bigger boost to CEL would be good, but for Blood Whistle? Not a soft cap boost.

-I'd rather make the Overload amulet just apply the WIL bonus by default, but substantially increase the FP costs of all skills in return.