SQL Server 2008 :: Optimize Memory With Varchar (max) Datatype

I am building a table change log that will track each attribute update and include the original and new values.

[BatchYearMonthKey] [int] NULL,
[BatchYearMonthDayKey] [int] NULL,
[AccountID] [varchar](200) NULL,
[Attribute] [varchar] (200) NULL,
[Old_ValueAtrDefault] [varchar] (200) NULL,
[New_ValueAtrDefault] [varchar] (200) NULL,
[Old_ValueAtrLong] [varchar] (max) NULL,
[New_ValueAtrLong] [varchar] (max) NULL

The challenge that the spectrum of varchar lengths across the table. I have one attribute that requires varchar(max) and all other attributes (about 40) are varchar (200).

I am trying to accomplish the following:

Account ID Status
1 Enabled

Now changed to

AccountID Status
1 Disabled

My log table will look like the following:

[BatchYearMonthKey] BatchYearMonthDayKey] [AccountID] [Attribute] [Old_ValueAtrDefault] [New_ValueAtrDefault] [Old_ValueAtrLong] [New_ValueAtrLong]
201504 20150409 1 Status Enabled Disabled NULL NULL

My question:

I created two fields (Old_ValueAtrLong and New_ValueAtrLong) dedicated for the one attribute that is a varchar (max). I was trying to avoid storing [Status] for example that's a varchar(200) in a field that is varchar(max). Is this the right approach? Or are there other recommendations in how to handle storing the data in the most efficient manner?