NTEXT,Indexing, and lob logical reads
Are you allowed to add computed columns in the table or create a materialized view?

You could add a computed column and then index that:

ALTER TABLE &lt;table&gt;
   ADD ntext_as_nvarchar_max AS CAST(ntext_column AS NVARCHAR(MAX))  ;

CREATE INDEX index_name
  ON &lt;table&gt; (&lt;index_columns&gt;) INCLUDE (ntext_as_nvarchar_max) ; 


The issue with this approach is that your queries will have to reference the new computed column (ntext_as_nvarchar_max) and not the original column for the index to be used.

Test at SQL-Fiddle