Mage best build atm?

[Magicpayme]

For an elemental build you want:

-Blood Weapon
-Blood Helm
-Blood Armor
-5/5 Elemental Set
Any elemental set works well.
But bio set seems to be the best for now.
Because blood orb deal nature damage.
I think every blood weapon will have it's own elemental damage.

You want boss damage or elite damage awakes on your items.
Elite damage awakes would be the best.

You want 15% critical damage on your weapon (or higher).

And because you have a shadow set, put shadow gems on all your items.

The set is have is like 87 ebd and fully gemmed. Ill get blood orb even though it isn the perfect fit, to my shadow set.

Does this mean there is no need to switch between sets. For bosses just attack with the blood orb and ele set?