Up to now my top dps team is 60% physical and 40% magical with a comp of LingLing: Sylphi: Sarya: Kong: Tashi. Just picked up Goram and swapped him for Sylphi as he adds to total physical damage done. This increased my physical dmg by 100%. Only now the only magic damage dealer is Sarya.

What are the primary magic support and magic dps that I should have available to use should a enemy show up that is physical immune?

Sylphi is one of the best. Nilya, Sumiko (awakened) for groups, Adeline, Alecia (also for groups)