I honestly did not think this will worked havinf tried almost every cachinf plugin on my website.
1. BerqWP was not multisite compatible and the team of BerqWP took care of that withing a few days, sent me an update email, and without me having to touch anything after first install the site jumped to the promised 98 / 99 % speed
2. support was polite, responsive and very helpful

In short .... it worked for me perfectly

thakn you