Sticky Posts in Post-Slider?

On one of my enfold playground testpages – i got under each of my single post a post slider with other post to show randomly.
First: I do not want to show the current post in this post slider on single posts.
Second: i’d like to have allway that one ( or more ) sticky post on the beginning of that list.

These codes comes to child-theme functions.php:

The first is easier to obtain:

function ava_exclude_current_post($query) {
  if (is_singular('post')) {
    $exclude = avia_get_the_ID();
    $query->set( 'post__not_in', array($exclude) );
  }
}
add_action('pre_get_posts', 'ava_exclude_current_post');

so i exclude the current ID from query.

The second request:

add_filter('avia_post_slide_query','avia_order_by_random', 10, 2);
function avia_order_by_random($query, $params) {

	$include = array();
	$sticky = get_option( 'sticky_posts' );

	$args = array(
	'post__not_in' => $sticky,
	'orderby' => 'rand',   // here you can influence the orderby option of the non sticky post to your needs 
	);
	$posts = get_posts( $args );

	foreach($posts as $post) {
	$include[] = $post->ID;
	}
	if ( !is_sticky() ) {
		$include = array_merge($sticky, $include);
	};

	$query['post__in'] = $include;
	$query['orderby'] = 'post__in';

return $query;
}

orderby: https://developer.wordpress.org/reference/classes/wp_query/#order-orderby-parameters

if you only want this on special pages you have to work with if-clauses.

do you only want to show the latest sticky on that slider first?
a sticky in sticky does not exist afaik.
But you have to describe a little better what you want to achieve.

You can have the newest stickies on top – and you can limit it to a given number.
rsort( $sticky ); is something could be helpful here – maybe a mod knows a solution

Do you have a link to this page? It is difficult to give concrete advice based only on assumptions.

Dear Dev. and mods : i see that Enfold uses post_class()
i like to have the sticky ( or something to have for styling ) class on post_class
so i did this:

add_filter( 'post_class', 'add_sticky_classes', 10, 3 ); 
function add_sticky_classes( $classes, $class, $post_id ) {
    if ( ! is_sticky() ) {
        return $classes;
    }
    global $wp_query;
    $classes[] = 'stickypost-' . $post_id;
    return $classes;
}

and on single post now there is that stickypost-ID class
BUT: on article ( blog pages etc archives ) this CSS class is not forwarded to article allthough it is in postslider.php done.

Solution found adding “numberposts” to -1 in here:

$args = array(
‘post__not_in’ => $sticky,
‘orderby’ => ‘date’,
‘numberposts’ => -1
);