Triple Nested IIF with SSRS

I'm using SQL Server 2012. I currently have the following nested IIF statement

=IIF(RowNumber("Period") = 1
     , IIF(ISNOTHING(Fields!Row2.Value),"","    "&FormatNumber(Fields!Row2.Value,1) & " %") 
     , Fields!Row2.Value 
    )

The purpose of this is that the first row of the result set requires a % sign to appear after the Row2.Value for example

client1  1 % 2 % 3 %
client2  4   5   6
client3  7   8   9  

That part is working fine. Client1,Client2, Client3 as you see above is a field named Fields!Composite.Value

If Composite = 'Client10' I need to display 'n/a' instead of the Row2.Value, for all others I want to show Row2.Value. The desired result is below.

client1  1 % 2 % 3 %
client2  4   5   6
client3  7   8   9  
client10 10  11  n/a  

I'm having trouble extending the IIF statement so that this third condition is nested. If I did not need to nest the other IIF conditions the IIF statement would look like this

=IIF(Fields!Composite.Value ="client10","n/a",Fields!Row2.Value)

So I need to combine all three. I was also thinking a SWITCH statement may be better but I'm not yet that adept using SWITCH.