A few suggestions that may or may not be satisfactory for you:
Using KES, enable General > Hide sidebar elements > Random threads, Random mags, Random posts
. The randomly populated sidebar is fundamentally flawed; I suggest disabling its content altogether.
Next, enable General > Filter advertisements
. This second feature is by no means foolproof, but will reduce a lot of noise, and is periodically updated on a rolling basis.
If your main goal is exporting your magazine subscriptions between accounts across instances, may I suggest trying EXIT tool. If you are looking for more complex export settings (friends/favorites?), unfortunately, only subscriptions are supported at this time.