Posting my take before I wade into the struggle session

Adding reasoning:

Earth shield, obvious sturdy combo

Dark dagger, good for sneaking

Light sword, holy relic but still kinda basic

Ice axe, did this one last but it kinda still makes sense

Nature whip, pokemon vine whip need I say more

Wind bow, long shots, gusts can alter arrows trajectory

Fire claws, fast attacka make the cumulative damage add up quickly, similar to the poison knuckles reasoning

Water spear, sweeping fluid slashing and sharp, jet like stabs just fit water. Fluid yet forceful

Poison knuckles, rapid punches add up the poison damage fast

Thunder hammer, it's already a great big concussive hit, thunder just increases it