Most of the users don’t reach your second page on an archive page, so why not randomize your archive pages to get some hits for your older content.
Here is a really simple trick to randomize your category and tag arhives.
Just open functions.php in your theme folder and put this code in
// Random ordered on category pages
function shailan_post_order( $query ) {
if ( $query->is_archive ) {
$query->set( 'orderby', 'rand' );
}
}
add_action( 'pre_get_posts', 'shailan_post_order' );Just save and upload it.
Visit any archive page (category, tag archives etc) and you will see your posts are randomized!
Hope you like this trick. Enjoy!