There are 2 things with Shield of Absorption that may lead to possible exploits.
You can push back and position neutral “yellow” monsters across the map without being attacked back.
Putting Shield of Absorption on auto attack Ctrl + Rmb cause the dome to stay forever.
the dome in there forever does work, but it is just an animation effects bug, it will not block any bullets after its normal duration expires, if you move it will stop showing the animation.
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