Bat Wings are fugly. Make them better.

Rending Gale looks like a pickaxe. Make it shinier, clean up the sprite and give it sprite animation (flapping wings). Make the core of the staff glow.

Harvest Rod is close to being okay, but make it nicer, maybe with some pulsing "living" animations, and a glowing core perched on the staff.

The shears of winter look great. Take the "sparkling" effect from them and apply it to the Glacial staff.

The Infernal Chalice isn't supposed to be pretty, but it could look cooler. Give it some pulsing/creepy darkness effects.