[Implement Revive with Google Tag Manager]

 

Also was strugling with it.

My solution is fire on all pages with dom manipulation.

Works fine, here is example 

TAG

<script async src="//{YOUR-DOMAIN}/www/delivery/asyncjs.php"></script>
<script>
var firstAdPlacement = document.querySelector('{YOUR-PLACEMENT');
var firstAd =  '<ins data-revive-zoneid="1" data-revive-id="{YOUR-BANNER-ID}"></ins>';
firstAdPlacement.insertAdjacentHTML('beforeend', firstAd);
</script>

TRIGGER

ALL PAGES