Proposal:

In a recent Strip, Durkon Holy Worded the Linear Guild. Z'zdriti was deafened but not blinded (as Tarquin could Drow Sign Language him). Therefore Z= Level 16. In Strip 795, Varsuuvius says that Z'zdriti is of equal level to him. Therefore, Z and V are both Level 16.

By the same logic, since Nale is level 16 and he is the rival of Elan, they are both the same level. Meaning Elan the bard is level 16.