Elemental damage works in all maps, it's just that in specific maps, depending on the monsters, they may have specific elemental resistances. The Bio...
While Energy Kits, Energy Essence farming / Energy Crafting is being phased-out for certain events, it will still be central to various major events...
I like the impermeable set mechanics, it makes the grinding somewhat different from every other map, where I would just use the usual maxed-out set....